Résultats de la recherche : wheel

Colnago 2009 – FMB – Mavic [en]

Colnago CX1 – Revolution

The famous italian company is going to offer a brand new frame in November 08. The CX-1 is designed for racers looking an agressive and modern frame. Colnago focused on improving the
stiffness to transfer the power as well as possible, but as well on the weight (1010g) to climb in the best conditions.

CX1 – Revolution


FMB

In Bretagne, François Marie, artisan manufacturer of tubulars, provided Quick Step with special hand-made tubulars
for Paris-Roubaix. They seemed to work pretty well since Tom Boonen took the best of them until the end.


Photo ©: James Huang/Cyclingnews.com


The artisan makes custom tubulars and we got in touch with him for a set of lightweight tubes, with silk casing and a good resistance. François made us two
sub200g tubes in 20mm and a prologue rubber.  « There is no problem to use prologue tubulars on good roads, but it’s better to avoid loose stones and gravels » said the
artisan.
Custom hand-made tubulars, excellent work and amazing ride qualities, we like these a lot!


Mavic

While it lost its interest when the clinchers got released, the tubular is coming back at the same time as the carbon wheels, since 5 to 6 years. For our friends the mountainbikers, the
tubulars are not so common, the difficulties to repair them and their high price do not make justice to their ride qualities. Tubular MTB wheels are very rare, only a couple of
manufacturers dare shyly offering such a rim. It seems like the trend is changing since Mavic is doing it tii! Light-bikes.de got the chance to take a couple of shoots, during
the world cup in Offenburg, of tubular CrossMax for a Cannondale Lefty fork.



More information (german)

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Girs G-MAX – Parts of Passion

Girs

Présenté durant le salon du deux roues début Octobre 2007, le Girs G-Max a fait coulé beaucoup d’encre. Toujours en cours de développement, son système d’ajustement du boitier de
pédalier est attendu par beaucoup comme la solution pour pallier aux faible nombre de géométries disponibles par rapport à la multitude de morphologies que nous représentons.
Afin de nous faire patienter et d’apporter éventuellement notre pierre à l’édifice, Guillaume Girout et son équipe ont réalisé un blog très accueillant sur lequel nous vous invitons.
Dessins techniques, croquis, éclatés et géométries y figurent.


Parts of Passion

De l’autre côté de la frontière allemande, Gerhard Dummert fondateur de Parts of Passion dévoile des attaches rapides très légères. Le petit régime avant l’été semble avoir
été de rigueur puisque les attaches route ne pèsent que 31/32g. Les premières versions sont un poil plus grasses puisque Nils (pk0r.com) a
la chance d’en tester une première paire affichant 36,5g sur la balance. Les matériaux utilisés sont l’aluminium pour les axes et le titane pour les leviers. Une version VTT sera disponible
aussi pour 38/39g, axes titane avant et arrière. Les coloris proposés seront: noir, argent, rouge, bleu, or.
Le prix est annoncé aux environs de 89 euros.

Plus d’informations: Fairwheelbikes


Picture ©: Nils/pk0r.com
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Girs G-MAX – Parts of Passion [en]

Girs

Unveiled during the « Salon du deux roues » in France, early in October the last year, the Girs G-Max still is under development. Its bottom bracket position adjustment seems to be the
solution to compensate for the lack of geometries offered on standard road frames.
While waiting for the availability of the frame, and eventually bring our ideas to develop, Guillaume Girout and his team made a nice blog. Technical drawings, sketches and geometry
are among the things you can find there:


Parts of Passion

On the other side of the border, in germany, Gerhard Dummert founder of Parts of Passion is releasing some light quick releases. The weight save is obvious since the road
version is only 31/32g. The first versions are a little fatter: Nils (pk0r.com) has been lucky to test a first set hitting the scale at
36,5g. The materials used here are the aluminium for the axles, and titanium for the levers. An MTB version will be available too: 38/39g, titanium axles for both the front and rear. The
colors offered will be : black, silver, red, blue, gold.
Price should hit at 89 euros.

More information: Fairwheelbikes


Picture ©: Nils/pk0r.com
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Tests

Lew Pro VC-1 2009
     La révolution…? SUITE


     The revolution…? MORE

Rotor Q-Rings
    Et toi, tu pédales comment? SUITE


    And you, how do you pedal? MORE:

Michelin Pro 3 race
    1ère partie: présentation du premier bi-gomme route. SUITE


    1st part: presentation of the first dual-compound tire. MORE

Fibre-Lyte, transmissions carbone || Carbon transmissions
    1ère partie: présentation; SUITE:


    1st part: presentation; CONTINUE:

    2ème partie: 1er test; SUITE:


    2nd part: 1st test; CONTINUE:

    3ème partie: suite du test; SUITE:


    3rd part: next part of the test; CONTINUE:

    4ème partie: sur la durée… SUITE


    4th part: what’s with the kilometers… MORE

Sram RED – Cassette
    Vue rapprochée… SUITE


    Close view… MORE

Lew Racing Pro VT1 (840g)
    1ère partie: Pourquoi sont-elles si attrayantes? SUITE:


    1st part: Why are they so attractive? CONTINUE:

    2ème partie: sortie avec les anges SUITE


    2nd part: a ride with the angels MORE


Lightweight Generation 3 (990g)
    Revenues aux petits oignons… SUITE:


    Browned with onions… MORE

Shimano 7850 C24 & C50 TU (1246g & 1489g)
    Vues à la loupe! SUITE:


    Checked with a magnifying glass! MORE

Speedcomposites Sinus 2007 (1002 gr)
    Des roues à décrouvrir; SUITE:


    A wheelset to know; CONTINUE:

    Du nouveau! SUITE:


    Some news! CONTINUE:

Mavic Cosmic Carbone Ultimate (1190g)
    1ère partie: Que peut-on en penser? SUITE:


    1st part: What can we think about them? CONTINUE:

Mavic R-SYS! (1355g)
    1ère partie: Un système révolutionnaire! SUITE:


    1st part: A revolution! CONTINUE:


   
    2ème partie: Les sensations sur la route… a suivre
    2nd part: how they feel on the road… to follow
   

Lightweight Obermayer Generation II (922g)
    Outstanding Lightweight Obermayer II ! CONTINUE:


    Formidables ces Lightweight Obermayer II! SUITE:

    2ème partie: Le comportement sur la route… a suivre
    2nd part: the behaviour  on the road… to follow

Patins de freins || Brake pads
    Swissstop, présentation: SUITE:


    Swissstop presentation: CONTINUE:

    Corima, présentation: SUITE:


    Corima presentation: CONTINUE:

Powercordz
    1ère partie: Un système de câbles très spécial; SUITE:


    1st part: A very special cable system; CONTINUE:

    2ème partie: Comment les installer? SUITE:


    2nd part: How to install them? CONTINUE:

Comparatif attaches rapides || Quick releases comparative
    Quelques attaches faciles à trouver: SUITE:


    Some easy to find quick releases; CONTINUE:

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Lew Racing Pro VT-1 B+ [en]

Lew Racing pushes the envelope. Unhappy to offer the technically most advanced rims ever created, Paul Lew created a second version of the Pro VT1 for custom hand built wheels. This
newest version is visually identical to the standard Pro VT1, which was released about one year ago. But on the scale, or even in hand, the difference is quickly perceptible! With a feather
235g per rim, against 275g for the standard version, the Lew Racing Pro VT-1 B+ rims will make you reach the top of the world! The feat is made possible thanks to the addition
of boron fiber to the rim. Thus the structure still is as stiff, impact and tension resistant, but about 40g are shaved off.
The braking, with brake pads for alloy rims is still as powerful.

The two samples presented below will be unveiled during the Sea Otter Classic, in the United-States in the following days. The rims of the B+ serie are guarantied sub 250g and are
still 46mm deep. The price will be about US$1200, which is approximately 900 euros per rim in Europe.

Certainly, the character behind all this have brought a lot to the bicycle world. Reynolds, Shimano, Edge, to quote only a few prosperous companies, all beneficiate of Paul Lew’s knowledge.
The first one bought the manufacturing process of the old rims (2002), the second got helped to make their carbon rims (2004) and the last one copied a part of the process.

When will we see a full boron version…? The light high quality tubulars will soon be heavier than a high tech rim!

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Michelin Pro 3 – the ultimate tire?

Michelin is definitely a tire manufacturing specialist. The French company this year introduced the latest Pro 3 Race clincher, drawing on 120 years of
experience in this domain. As its name indicates, this tire is the third in the series that started with the green and black Axial Pro, which performed very well in the dry but was
unfortunately unsafe under wet conditions.
The second iteration, the Pro 2, was released in 2003 and received a couple of important improvements to increase grip while cornering in the wet. It was offered in several colors.
The development of the latest Pro 3 has captured our attention. We followed its development last summer during the Tour de France when some teams were checking the tires lived up to
Michelin’s expectations in terms of puncture resistance –  they are among the best on the market.

   


The first dual-compound road tire


Technically speaking, the Pro 3 features the dual compound technology well proven in MotoGP and MTB: it differentiates the central rolling compound from the cornering compound, allowing
both a low rolling resistance and a high grip while cornering. The cornering compound provides about 40% more grip than the rolling compound and thus, the cornering adherence is about 27%
higher than the same tire with a single compound. According to Michelin’s laboratory test, this allows the rider to « attack a roundabout of a 25 meters radius on a wet and slippery road
at an angle of 34 degrees. This translates to 41km/h, which is 5km/h faster than a competitor race road tire under the same conditions
« 

According to Michelin, the rolling resistance, which is very important for road racing, isn’t affected since a new compound with new mechanical and physical properties, providing high
deformations (meaning low loss) were invented.


A puncture-proof tire?


Michelin began road tests on the Pro 3 Race early in December 2006. With almost one million kilometers ridden on this high end tire, the company from Clermont-Ferrand only had 169 flats.
The figure by itself may sound high, but taken as a whole, it statistically only means a flat every 5919km…! Considering the average life of the tire is about 3600km, it seems like this
is one of the most resistant tire. You shouldn’t be able to expect a flat before the tire is completely worn. How cool is this?
This feat is achieved thanks to a high density puncture protector belt made out of nylon, just below the rolling compound. It sounds really good, at least on paper.
We are currently testing this tire and we will be able to give an objective point of view in a few months.

   


The installation: for athletes!


It’s a fact, Michelin’s tires always have been hard to mount. The internal diameter of the kevlar folding bead, which will hardly stretch at all, seems a little smaller than usually.
Although it prevents the tire leaving the rim bed in case of a flat, it makes fitting a bit of a fight! If you have a Campagnolo wheelset, whose external rim diameter is a very little
bigger than the standard, the mounting process is a strength challenge.
The first bead is quite easy to place, however the second one is almost impossible to place without a lever. So take care not to pinch the inner tube.

   


The judgement of the scale


The rolling resistance and the weight of a tire are very important. Choosing a tire is almost as important as choosing a wheelset. That’s why we have to pay attention to these two
properties. The first one is not possible to check, unless the tire is poor, which is not the case. However, the weight is much easier to verify. The Pro 3 we have, weight only 203g. This
is in the lightweight range for a high performance, puncture resistant clincher.


The range


The Pro 3 Grip and Pro 3 Light will be unveiled at Eurobike. Although Michelin has not given any information regarding these two tires, the Grip version will certainly be more durable and
puncture resistant (even more?!). The Light version will probably lose some precious grams to weight a nice 180g, at least if we translate the current Pro 2 range differences to this range.
The durability and resistance will obviously be a little lower than the standard version.
Some other « concept » colours, Michelin said, will be offered to match different colour schemes on 1st June.

Previous Roues Artisanales articles:
Michelin Pro 3 Race
Michelin bibendumized us
Michelin Pro 3 Race, Vittoria Prototype, Veloflex 2008 [en]
Michelin Pro 3

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Taipei – Orbéa – Roues Artisanales in test – Dura-Ace 2009 [en]


Taipei bicycle show

Taïpei bicycle show took place in Taïwan during 4 days, from the 16th to the 19th of March. Although there were no interesting news, since the manufacturers prefer to feature their newest
stuffs during the Eurobike and the Interbike, we could see some interesting products.

Rival levers

Sram Rival levers will get a carbon structure for 2009. After most groupsets from Campagnolo Record, Chorus, Centaur, then Sram Red, and finally Shimano Dura-Ace for 2009 too, it’s Rival’s
turn to get a new look.

Grammo wheels

Do you remember the Grammo wheels we presented mid septembre 2007, a few days after the Eurobike where they were actually
almost hidden…?

Well, the wheels were obviously featured in Taïpei and they brought a lot of attention. Take a look at the picture below, you can see the very special spokes looking like everything but a
spoke! The associated tensiometer is a pure beauty.

Source:
WeightWeenies
Fiets


Orbea Orca 2009

Featured on Cyclingnews, the latest Orbéa Orca, which will be available for 2009, gets more muscle with 20% more stiffness thanks to different fibers and loses 10% of weight at the same
time. The frame will end up at a light 850g and the frame/fork/headset at 1290g. The biggest weight save come from little gains at miscellaneous components such as the seatpost collar which
is made out of magnesium. Some parts are still in aluminium: the frame drop-outs need reliability and easy replacement in case of crash. They anyway are lighter: 25g are saved!

More information.

Photo ©: Ellis Bacon @ Cyclingnews


Roues Artisanales Lew/Tune/DT Aerolite

The german website Light-bikes.de got a handbuilt wheelset from our hands to test and feature. With just 1039g the complete wheelset (1042 with some tubular glue), the Lew Racing Pro VT1
2008 rims, the Tune Mig70 and Mag180 hubs, and the DT Aerolite bladed and tied spokes bring superb ride qualities. Please have a look at the first part of the test.

Roues artisanales test (in german).


Shimano Dura-Ace 2009

The french magasine L’Acheteur Cycliste has got very sharp pictures of the latest Shimano Dura-Ace 2009 mechanical groupset. The rear derailleur with the carbon shape is clearly visible,
and the carbon crankset too. Feel free to get the edition of April.

L’Acheteur Cycliste

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Alchemy’s hubs

Jeremy Parfitt, the head of Alchemy Bicycle Works, distrubutor of Tune, M5 and Sapim in the US, is about to offer his own front hub. Continuer la lecture

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704,4g – New records!

It’s already a few months since we presented a new weight record. The last « championships » took place during Eurobike and Interbike and the few days following.

First of all, Lightweight featured its Challenge 700 weighing 759.6g behind glass on their booth during Eurobike. Lew Racing then responded with their Pro VT-1 made entirely of boron, at
just 736.4g. And finally, Sebastian Roth, a real Weightweenie reached a pleasing 721.3g after some modifications to the Challenge 700!

We thought the cold war was over, but we didn’t bank on Günter Mai, a man married to a weighing scale. Günter bought the full boron Lew Racing Pro VT-1
with some ideas in his head… Read below how a bike wheelset is almost sub 700g!


Relentless, both on the bike and in his garage…

Paul Lew started this weight war with his super light wheelset – a very special version of his Pro VT-1, made in full boron, from the hub to the rim and the spokes, in
order to compete with the better known German wheels. Günter Mai, a man who spends serious hours on his bike, picked up a set of these
already very special wheels. With up to 1,000km a week on his carbon steed, he certainly rides more than most of us.

He built the world’s lightest bike of 2007 (3.3kg), and is trying to convince the world his super light bike is a perfect everyday ride and doesn’t suffer any reliability issues. We believe
him. However, we must admit that his 6-speed cassette, the frame shifters and thin bartape shortened as much as possible is a little over the top… OK, everyone has his point of view on
lightness. This said, the German isn’t only a good rider and good at choosing and assembling the lightest parts. He also has some creativity, and more importantly the ability to work with a
lathe to lighten already light parts further. But he doesn’t want silly weight savings, he focuses on clever lightweight constructions to retain high reliability and stiffness.

The freewheel body is a good example: since he only uses 6 cogs, why not machine the extra splines and drill the body?! It’s done, and it doesn’t compromise function: he’s already used this
for 1,200km without any problems! The axle end cap diameter was a little too much for him too, so he machined them down and shaved a few more grammes.

In total 32g has been shaved off. OK it’s only about a mouthful of isotonic but it is a real challenge to save even more on a wheelset like this. Beside this, any saving is good as long as
it doesn’t affect reliability or performance!


The lightest?

The weight record is a success. This wheelset will certainly remain on top of the podium for some time…
704.4g for a complete wheelset. That’s crazy, right? Nowadays light tubular factory wheels of similar rim depth are normally about 1,400g – or two pairs of these
beauties.
Any chance we can have a try?!

In parallel, Günter modified a couple of components on his bike, which feels like a feather and weighed in at a mere 3195g. This is a perfectly rideable/usable setup. Most
of us would not be comfortable with this machine, but the owner loves and rides it everyday. This is what matters.

Thanks to Nils, who had a ride with Günter for the pictures!

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Mavic R-SYS, what’s up?

The Mavic R-SYS wheelset has received a lot of media attention since their release. The well received TraComp system delivers weight saving and stiffness thanks to two critical points.
First, the very stiff carbon spokes are under very low tensioned and allow light rims.
Second, the wheels have been designed to hold the ends of the spokes firmly, through a ring in the hub and the thread in the rim. This is what theoretically makes them so stiff. We won’t go
repeat all the details here, but if you want to know more, you can read all the specifications in this article, we published at the end of June ’07, a couple of days after they were announced

So 7,000km later, what do we think about these wheels in terms of reliability and ride quality?

Although we have never really fussed over the products of the big wheel manufacturer (yes, yes we admit it!), we have to acknowledge these are pretty good, though with a few points for
improvement. Listen up Mavic R&D!


On the road, observations…

First of all, the R-SYS are quite light for a clincher wheelset. Claimed to be 1355g, they are obviously a little heavier at 1390g. We are still in the light weight range and this can
be felt on the road, both during accelerations and in uphills. However, our location in North France does not allow easy access to big mountains. We ride mostly on the flat with some steep
but short uphills (never more than 1km). You definitely noticed that the R-SYS are the only alloy wheels that entered the first group in our great wheel test (here). This is not trivial and they are quite comfortable with
some quite light tires (Michelin Pro 2 Race) and Michelin latex tubes.

In short, having trained hard with these wheels all winter and the end of last year, we noticed the following points:

  • The front wheel makes some metallic noise while standing on the bike, it does not really like the rough roads, this is quite annoying… We understand Mavic have made some changes and
    it seems more recent production runs do not suffer this problem.
     
  • Excellent reliability, we didn’t have a single problem in 7,000km.
  •  
  • Although the stiffness is claimed to be very high, we didn’t really feel it on the road. This was specially the case during the strong accelerations: the rim was still moving left and
    right between the brake pads, which is probably not the epitome of stiffness… but it might mean the contrary. Is the load on the rim, coming from the ground, entirely passed to the
    opposite side, to know between the brake pads, showing the high stiffness? Is the rim deflection due to the torque transfer, which is different for the two flanges of the hub, as we
    explained in the review of the Lew Racing Pro VT1, strangely very stiff thanks to their central flange transfering all
    the torque? That is hard to say, but we think about this last version. By the way, the next part of our great wheel test is taking longer than expected because of these observations. Tour
    didn’t seem so rigorous in considering this parameter. The more we study the overall wheel stiffness, the least lateral stiffness seems important for wheel performance…
  •  
  • The bearings were tight to start with but are now pretty smooth.
  •  
  • The braking performance is still as good. The machined braking tracks work very well!
  •  
  • The light silver glossy « engraved » letters on one carbon spoke of each wheel tend to disappear.
  •  
  • Although this is totally imperceptible while riding, the front R-SYS is a veritable parachute compared to slimmer spoked wheels! (see the aero test)

 


Conclusion

We’ve told you everything you need to know about the R-SYS. They still have some teething faults but we enjoyed riding them. Ideally, they are best used for the mountains, when light
weight and low inertia count, and when aerodynamic properties of the wheel do not matter so much. But they aren’t confined to the most aggressive terrain: they will also do well in
races/rides when we expect a lot of kilometers at pace before attacking in the final uphill.
Anyway, do not use them during real high speed rides. You will be slowed down too much!

 


What would need to be improved ?

Basically, the R-SYS would be far better with the following two improvements:

  • The front spokes could be slimmer and bladed: aerodynamics would be far better. However, stiffness will be lower (since the cross section is reduced), but who needs a super-stiff
    front wheel…?
  • Another colour option might look bolder than the silver/gold/black that isn’t a good match for many bikes

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Carbon transmissions… how do they hold?

We spoke about the carbon transmissions the last year, when we reviewed the chainrings and jockey wheels from Fibre-Lyte.
Originaly we were quite reticent to use such a material for the transmission. Finally, we are very pleased with these high tech toys.

The jockey wheels

Although we thought about switching to stock record chainrings by the end of September to avoid the extra wear caused by the cold, the rain and the salt coming with the winter roads,
the jockey wheels didn’t receive that much attention… They were mounted in June and ended their life a few days ago after a complete bike cleaning. Despite the thousands kilometers (about
7000km: 2007 was a very small year regarding the kilometers…), and the dirt/dust, which found refuge between the wheel and the washer, they still were functionning very well: smooth and
fluid.
Ok, they now look as ninja throwing stars instead of a bike transmission component, but for sure they could have hold a few hundreds extra kilometers without a doubt.

Here are the pictures, today on the left, and brand new on the right…

The chainrings

About the chainrings we have used the last summer, they still look very good after more or less 2000km. The shape of the teeth is not as regular as the first ride, but they are still
perfectly rideable. Roughly, if you are gentle with your bike, you can expect more or less 5000km. However, if you do not take care that much about your stuffs, do not hope more than 3000km
from them.

Fibre-Lyte, the carbon transmissions, conclusion:

Basically, here are the most important points we found about the carbon chainrings and jockey wheels:

Strong points
+
Weak points
Weight save: about 60g for the chainrings, and 10g for the pulleys, from the stock Campagnolo record Wear three or four times  quicker than a standard transmission
Agressive look The chainrings are brittle: do not shift chainring when pushing hard the pedals
Custom components: teeth, engraving, shapes, etc. Price
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SRAM RED – Cassette [en]

The PowerDome, an ingenious pyramid…

The brand new Sram RED cassette definitely scored a bull’s eye when it was unveiled the last summer, during the Tour de France. Indeed, while
most manufacturers didn’t change a single element of the cassettes since ages, Sram had the idea and the opportunity to change this. The system is quite simplistic in the absolute.
Actually, every revolutionnary components are designed through a simplistic idea.

Usually, every cassettes are composed of differents cogs attached to the rotor splines. Sram wondered if all these contact were really necessary and, what would happen if the contact was
smaller. Why keeping the contact area of each cogs? And what would happen if only a few of them would transfer the torque? Finally, why not fixing all the cogs together and removing the
central material?

That is why Sram developped the PowerDome technology: the height largest cogs of the cassette are machinned out from a single piece of chromoly steel, and the central material is machinned
too.
Have a look at this:

So many advantages…

Only three cogs are in contact with the freewheel body: the largest through the Sram Red stamped red alloy insert, and the two smallest. This brings several advantages:

  •  – Weight save thanks to the low material quantity
  •  – High stiffness thanks to the block of cogs
  •  – Perfect spacing between each cogs
  •  – Heat hardened and nickel coated steel for very high length of life

Thus, the 11-23 and 11-26 cassettes are only, according to the manufacturer, 155 and 166g on the scale, which is 20 to 30g lighter than the best offers from Campagnolo and Shimano, and
only about 15g heavier than a titanium cassette. This feat does not compromise the properties we need from a cassette, it is realized from a relatively cheap and very resistant cassette,
which is not the case of the titanium.
On our scale, the 11-26 cassette weights exactly 161g without the lockring, which is 6g.


 
 
 
How does it work?

In practice, this cassette is to be mounted only on a 9s Shimano body. Indeed, the splines of a Shimano 10s rotor are deeper and can’t receive this component.
We fear the low contact surface with the freewheel bodies, it is reduced to a single cog for the eight smaller gears. We hope the alloy rotors will hold well under the torque created by
the pedals strokes…

We will keep you updated about it in a few weeks when the component will have some hundreds kilometers. To be continued.

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Etudes || Studies



27-10-2008 Grand test de roues
2008

Une immense base de données

    Introduction: SUITE:


    Les tests aérodynamiques: SUITE:


    Les tests d’inertie: SUITE


    Les tests de rigidité: SUITE




A huge data base
    Introduction:
MORE:


    Aerodynamics tests: MORE:


    Inertia tests: MORE


    Lateral stiffness tests: MORE




10-12-2006 Grand test de roues 2006
Une grande base de données! SUITE:


A great data base; CONTINUE:

08-02-2006 Fonds de jante allégés || Light Rim Tape

Le fond de jante les plus léger; SUITE:


The lightest rim tape; CONTINUE:

14-01-2006 Transfert du couple d’une roue || Wheel Torque Transfer
Optimisez la qualité des montages artisanaux; SUITE:


Optimize custom wheel build quality; CONTINUE:

01-01-2006 Tire rolling resistance || Résistance au roulement des pneumatiques
What tire to choose? CONTINUE:


Quels pneumatiques choisir? SUITE:


24-10-2005 Les roulements céramique, suite || Ceramic bearings, suite
Une vue détaillée; SUITE:


A closer look; CONTINUE:


30-08-2005 Grand test de roues 2 || Great wheel test 2
Des roues passées au banc d’éssai de A à Z, interprétation ; SUITE:


30-08-2005 Grand test de roues 1 || Great wheel test 1
Des roues passées au banc
d’éssai de A à Z, données
; SUITE:


08-06-2005 Impact du nombre de rayons sur l’aérodynamisme d’une roue
Etude très intéressante sur l’aéro; SUITE:


30-08-2005 Impact du nombre de rayons sur la rigidité d’une roue
Etude très intéressante sur la rigidité; SUITE:

30-08-2005 Les roulements céramique
Les bases;SUITE:

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Zero Gravity NERD – Grand test Shimano

Zero Gravity


Les freins Zero Gravity Negative G, dévoilés il y a quelques mois, sont fabriqués en édition limitée, couleur rouge: il paraît
que ça fait « plus course »! Pour la petite histoire, Brian Molloy, passionné par la petite reine, a toujours aidé son ami Ted Ciamillo, fondateur de la marque Zero Gravity. Afin de le
remercier, il lui concocte des étriers très spéciaux, basés sur la version titane des Negative G.
Inutile de vous dire que ça envoie sévèrement et qu’il faut se dépêcher pour en obtenir une paire. Seulement 200 exemplaires pour ces freins à 190g (214g avec les patins), baptisée NERD,
pour New England Red Devil (Diable Rouge  de la Nouvelle Angleterre).
Le tarif est annoncé à 666 dollars… histoire de marquer le coup!
Ils sont malheuresement uniquement disponibles aux Etats-unis, deux paires par client maximum.




Shimano

Shimano propose depuis plusieurs semaines ses dernières roues 7850 C24 CL, la version pneu à jante carbone/aluminium, en test via les revendeurs à travers tout l’Europe. 2000 coureurs
heureux écument donc les kilomètres sur ces roues, afin de donner leur opinion sur cinq points:

  •  – Aspect général
  •  – Rigidité
  •  – Accélérations
  •  – Confort
  •  – Freinage
  •  – Performances globales

Il semblerait que les résultats soient plutôt très encourageants, les notes descendant rarement sous le 3,5/5.

Plus d’informations à partir de la page officielle:
The biggest wheel test in history

 

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Time Hi-Tense – KCNC quick releases


We presented the last summer the
newest Time Hi-Tense wheels, designed through Frullani concept: the rear wheel spokes tension are
balanced and regular. The official presentation of the concept, as well as the wheels tests took place in Majorca a few days ago.
We invit you to have a look at our partner Arueda.com to know more.
If you do not speak spanish, here are the most important points:

  •  – the bracing angles of the rear wheel are particularly balanced
  •  – the spoke tensions on both sides of the rear wheel are more balanced than on a standard wheel (3/2 ratio instead of 2/1 usually)
  •  – the spoke tensions are very consistent
  •  – the spoke tensions are very high, 150kg for the drive side and 100kg on the opposite side
  •  – the wheel remains very stiff, even under very high loads
  •  – the distorsion between the brake pads is lower than most race wheels

KCNC, specialized in to the manufacturing of high quality alloy components; unveiled its newest item: the quick releases.
They are very light: only 42g the road set and 44g the MTB set, very affordable: only $50, and pretty.
The materials used here are the alloy for the levers, and the titanium for the axles..

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Grand test de roues 2008 – Partie 2 – Inertie

Tests d’inertie

Crédit photo : www.photos-dauphine.com

Cette seconde partie traite de l’inertie des roues, caractéristique ô combien importante, qui entre dans les mœurs des cyclistes. L’évaluation des performances d’une paire de roues
passe forcément par son évaluation, même si son importance est somme toute relative sur l’ensemble coureur plus vélo. Continuer la lecture

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Extralite SLW [en]

Extralite released a new light and aero wheelset. The SLW shows up at 920g and feature the Lew Racing Pro VT1 rims, laced to their straight pull hubs and steel bladed spokes. With 16 front
spokes and 20 for the rear, the spoke count is optimized for aerodynamic and weight save. They look quite sober and classic despite the gold coated spokes. In term of stiffness, they won’t
reach the summits but it will certainly work very well with the light riders and the persons who take care of their components.
The set is 2299 euros.

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Tires


The knowhow, the seriousness and the quality of the François Marie’s handmade tubular
production hold our attention.
We suggest the Strada high quality road tubulars, providing high performances and superb ride quality.
Ridden by more and more pro riders at each race, we offer them to match our handbuilt wheels. They are available too as a spare part if you are in a hurry: you can avoid the artisan’s
delay. Beside this, these tubulars are mounted on a rim in a dark and dry place to age ideally.

Their specifications are very attractive:

  • – Cotton casing for the softness, the lightness and the resistance
  • – Latex inner tube for the comfort and the resistance
  • – Very dense center thread for the grip and a low rolling resistance, herringbone side thread for optimal cornering performance
  • – Very fair weight: more or less 250g
  • – Available in 20 and 22mm for front and rear wheels

€69,90 per tubular

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KURVE – Shimano – Tiso

KURVE CNC Brakeset

CarbonTec has added the KURVE CNC brakeset to their range of products. These superlight calipers are made to exacting standards from the best 6061T alloy. Cnc machinning, titanium
bolts, 7075 aluminium barrels adjusters and frame fixings make these sweet brake very light with only 144g per pair (w/o brake pads). The design is patented, meaning an unique design: the
cam lever mechanism, modulates the caliper with equal force to both arms giving smooth yet controllable braking power, actually as a dual pivot caliper.

They are available in CNC and polished black, with a very limited edition Gold anodised. Their price is £199.99.

Tiso
Tiso is on the way to offer an 11s groupset this year, during the Eurobike. Although we wonder if 11 speeds are really required, we are glad this exotic components company is pushing
the envelope. Will it need a special hub body? Will the rear wheels be even more unbalanced than they are already with 10s?
We will know more this year.

Shimano rumors

Beside the carbon crank arms presented a few months ago, Shimano will have some other new stuffs for the second part of 2008.
First, the electronic groupset should finally see the light in shops and should be available in quantity in 2009.
Second, the Dura-Ace levers will have their derailleurs cables under the bar tape, a la Campagnolo.

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FMB – Tubulars

We spoke about FMB, François Marie boyaux, a few weeks ago when an important french TV channel presented his work (LINK). François Marie makes those traditionnal tubulars by hand for the highest quality. We were obviously very interested in
this product that brings every qualities needed for a good tubular:

  • – Cotton casing for lightness, resistance and comfort
  • – Latex inner tube for comfort and resistance
  • – Low rolling resistance multi pattern rubber thread, high cornering grip  thanks to the rubber thread side pattern
  • – Very fair weight: more or less 250g
  • – Available in 20 and 22mm for front and rear wheels

We now offer these tubulars in the boutique in addition to the wheels, quick releases, bearings and components. A traditionnal handmade tubular plus a hand built custom wheel, would it
be the winning combination? Very certainly!

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Lew racing, Shimano [en]

Lew Racing


Mr.
Paul Lew is definitely among the rare persons on the earth who always innovate, research and feature new breakthrough products.
After the Black Holes wheels, associating the fork, the steering and the wheel, in 1995, he came back in the forefront some time later with the Palermo and KOM rims, he sold a few years
later to Reynolds in 2002. These rims are now mythical…
In 2004, it’s Shimano’s turn to learn from the character: the 7800 and 7801 first Shimano’s generation carbon wheels have been manufactured and designed with a proprietary aerospace 
manufacturing process. Paul Lew  is obviously behind this. He acquired this knowledge  through his aerospace and army drone sector (Lew Aerospace). We can even realize that the latest 7850 Shimano’s carbon wheels finish at the superior diameter of the rim is similar to the newest Pro VT-1 rims.  Here
too a parallel development?

The lest year, the Pro VT-1 swept away the standards used since decades thanks to a breakthrough design, very special
materials, and new manufacturing processes.

For 2008, it seems like the creator still has power under the pedals. After a small research on Google, we found a patent Paul Lew and one of his collaborator Jason Schiers, are the
author.
What’s the menu? A brand new hub system with a special free wheel mechanism: a notched body which is certainly the rotor where we place the cogs, engage in the hub through balls allowing
instantenaous engagement.
Since we only have the description of the patent, we won’t go further into the details and we prefer to wait gently for an official announce.
Beside this, some rumors announce the TOTW flat rims, for March, maybe April.

 

Shimano
At Shimano, the wheels chain is in Malaysia. The Dura-Ace wheelsets receive a better treatment and James Huang from CyclingNews visited this mounting factory. The
reporting is to be read from this link.
We can notice the special nipple system that seems to be screwed inside the carbon rim, probably through a metallic insert. This reminds us the Fore technology from the french
manufacturer Mavic: the rims are threaded to screw up the nipples.

  Photo ©: James Huang/Cyclingnews.com

 

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Lew racing, Shimano

Lew Racing


M.
Paul Lew fait définitivement parti des quelques rares personnes au monde qui innovent, cherchent, et mettent en avant de nouvelles solutions en permanence.

Après les roues Black Hole, associant la fourche et la direction à la roue, en 1995, il est revenu peu de temps après sur le devant de la scène avec ses jantes Palermo et KOM, qu’il
vendra à Reynolds, en 2002. Ces jantes devenues mythiques aujourd’hui… ou presque.

En 2004, c’est au tour à Shimano d’apprendre du personnage: les roues carbone 7800 et 7801, de première génération, ont été réalisées et conçues grâce à un procédé de fabrication
employé dans l’aérospatial. Paul Lew, est évidemment derrière tout ça. Sa branche aérospatial avec la fabrication de drônes pour l’armée (Lew Aerospace) lui ayant, semble t-il, permis d’acquerir les connaissances pour ce type de procédé.  Nous pouvons même constater, sur les dernières
séries Shimano 7850 que la finition, ainsi que la partie supérieure où l’on colle le boyau, ressemblent trait pour trait aux dernières Pro VT-1.
Ici aussi, un dévelopemment en parallèle?

L’an dernier, les Pro VT-1 ont balayé les standards acquis depuis plusieurs dizaines d’années grâce à un design inédit, des
matériaux tout aussi nouveaux et, des procédés de fabrication qui permettent l’impossible!

Pour 2008, il semblerait que le créateur en ait encore sous la pédale. Pour preuve: après une petite recherche sur Google, nous sommes tombés sur un brevet tout frais dont Paul Lew et un de
ses collaborateur, Jason Schiers, sont les auteurs.
Au menu? Un tout nouveau système de moyeu, un mécanisme de roue libre un peu spécial: un corps à encoches, qui pourrait très bien être la roue libre où l’on place les pignons, engrène dans
le moyeu, par l’intermédiaire de billes.
N’ayant pas plus d’informations pour l’instant, si ce n’est la description du brevet, nous n’irons pas plus loin dans les détails et attendrons sagement l’annonce officielle.
En plus de ceci, quelques rumeurs annoncent les jantes TOTW, plates, pour mars, voire avril.

 

Shimano
Chez Shimano, les roues sont fabriquées à la chaîne en Malaisie. Les roues Dura-Ace font l’objet d’une attention plus particulière et James Huang de CyclingNews a
visité cette usine de montage. Le reportage, plutôt intéressant est à lire à partir de ce lien.
Nous pouvons noter le système spécial d’écrou, qui apparemment est vissé dans la jante, probablement via un insert métallique incrusté dans le carbone de la jante. Ceci n’est pas
sans nous rapeller la technologie Fore du constructeur français Mavic.

  Photo ©: James Huang/Cyclingnews.com

 

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Lightweight Individual Design

Carbon Sports will offer an individual design on their wheels soon. Two sets of wheels designed for their sponsored riders Filippo Pozzato and Erik Zabel have been painted to match the
teambike in colors and style.

The added weight by the paint is approx. 35 grams/set.

Source: Carbon-Sports forum

 

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Best wishes

The year 2008 already began. Best wishes for the new year, may this new year bring health, success, and happiness.
Regarding the cycling, one of our best wish is to see it leaving the impasse it took a few years to reach.  We are for sure in the trough of the wave and it is urgent to get back on
one’s feet.
May 2008 bring as well some components and events news such as:

 – electronic Campagnolo Record groupset for the end of the year
 – carbon Shimano Dura-Ace crankset
 – Lew Racing TOTW flat rims wheels and the clincher version of the Pro VT-1
 – Lightweight derailleur, still unavailable…!
 – Mavic R-SYS wheels improvements
 – the Grand Test of L’Acheteur Cycliste, where we will obviously be present

 
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Lew Racing Pro VT-1 Tandem! [en]

Paul Lew has a lot of ideas in mind. He already has designed the most special wheels of the year 2007. He pushed the envelope further each time, with, in chronological order: a Tune
mechanism version, a full boron version, a Clydesdale version for strongest riders, and, last but not least, for Christmas: a tandem version!

Considering what these wheels are designed to, they are still incredibly light. They are reinforced to deal with the forces and weights of two riders. Compared with the Clydesdale version,
they have about 600g more material (or 800g more than the standard version) distributed on each item of the wheel. The rear wheel has two times more central spokes to transfer the riders
forces. 8 spokes deal with the riders power output while there are 4 on the standard wheels…!

 

In term of price, the wheels are about US$7500!

Previous Roues Artisanales articles:
Lew Racing, a ride with the angels
Lew Racing Clydesdale version
Lew Racing VS
Lightweight Standard VS Mavic CCU

Lew Racing 2008 rims
Campagnolo 2008, Lew Racing, Colnago 2008
Lew Racing wheels, why are they so attractive?
Lew Racing, M5: the rims are unveiled
Lew PRO VT-1: the new wheels

 

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Lew Racing PRO-VT1 Tandem!

Paul Lew a des idées plein la tête. Après avoir réalisé les roues les plus spéciales de l’années 2007, il a poussé les limites toujours plus loin avec, dans l’ordre chronologique, une
version avec mécanisme Tune, une version entièrement en bore, une version Clydesdale pour les coureurs costauds, et pour finir, pour Noël, une version tandem!

Logiquement, ces roues sont toujours très légères, en tout cas,  compte tenu de l’utilisation qui va en être faîte. Elles sont en plus renforcées pour encaisser les forces et poids de
deux coureurs en même temps.
Par rapport à la version Clydesdale, il y a environ 600g de matière en plus, (ou 800g face à la version classique) répartie sur tous les étages, tous les éléments de la roue. Les rayons de
la roue arrière qui transfèrent le couple sont au nombre de 8 au lieu de 4, toujours dans un souci de résistance à une puissance deux fois supérieure à la normale…!

 

Niveau prix, les roues seront à vous pour la bagatelle de 7500 dollars US!

Articles Roues Artisanales précédents:
Lew Racing, sortie avec les anges
Lew Racing, version Clydesdale
Lew Racing VS Lightweight Standard VS Mavic CCU
Lew Racing, les jantes 2008
Campagnolo 2008, Lew Racing, Colnago 2008
Lew Racing wheels, qu’est-ce qui les rend si attrayantes?
Lew Racing, M5: les jantes sont sorties
Lew PRO VT-1: les nouvelles roues

 

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Topolino Carbon Core KOM [en]


The newest Topolino
Carbon Core
wheels were unveiled at the Interbike about two months ago, where they generated quite a lot of interest. We covered briefly this important United-States event 
through an article you can read from this link.
Still a prototype, the current models use Reynolds KOM rims (230g), associated with the Topolino proprietary spoking pattern: the carbon/kevlar spokes are bonded together with the hub
flanges and can be replaced.
This new wheelset, which will fully be available during the fourth quarter of 2008, differs from the others Topolino wheels:

  •    – Super light Reynolds KOM rim
  •    – Full carbon hub instead of a carbon/thermoplastic composite, made in three parts: the flanges plus their spokes and the central part.
  •    – New termination design at the rim
  •    – Lightweight axle and hardware
  •    – Full ceramic bearings (balls+races) instead of steel
  •    – Expected in the low 800/840g the set (360g the front)

There are quite a lot of advantages for this special construction.
First of all, in case of failure, all the spokes of a side and their flange can be replaced for an estimated price of 100$. Second, the carbon/kevlar spoke structure is uninterrupted from
rim to rim and provide an extreme fatigue resistance. Third, as final argument, these hoops fortunately can’t go out of true.

Raphael Schlanger, founder and chief engineer doesn’t only focus on weight save and light items, he wants every products to be robust with the sturdiness of a much
heavier wheel.
The price of the wheelset is not decided yet. However, we heard about 5500 dollars.

 

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Archives 6 [fr]

Continuer la lecture

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Archives 6 [en]

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Bearings

<<< Back to the boutique



We offer hybrid ceramic bearings from CeramicSpeedfor the hubs, the bottom brackets, as well as an upgrade on all our wheels. Hybrid ceramic bearings have hardened steel races and
silicon nitride balls. This combo with very hard balls brings several benefits:

  • –  lower wear

  • –  longer life
  • –  corrosion resistance
  • –  lower rolling resistance
  • –  dirt and dust proof: the balls clean the races thanks to their hardness
  • –  lubrication is almost useless
  • –  weight save: ceramic balls are 60% lighter than the steel ones

The traditionnal steel bearings have 2 rubber seals (2RS) to be dirt and water tight for a long life. They increase the rolling resistance because they are in contact with the balls cages.
The hybrid ceramic bearings have extreme resistance balls and require a lower watertightness. Only one seal with no contact (ZZ), facing the exterior of the hub, where there is the most
dirt, is enough. This further reduces the rolling resistance for a speed and power save.  It is the setup we adopt when the « ceramic bearings » option is chosen.

We have the following ceramic bearings for the hubs of our boutique:
       – 6801
       – 6802
       – 6803
       – 6804
       – 6805
       – 6901
       – 6902
       – 6903
However, every sizes, for wheels, bottom brackets, as well as jockey wheels, are available on order.
The price ber wheel bearing goes from 50 to 80 euros depending on the size.

Every bearings kits we sell have a siringe to fill the grease and ZZ « no contact » seals.
A sticker kit can be added if needed.
Every bearings are pre lubricated. The special ceramic bearings grease must be measured out with parsimony to keep the ultimate fluidity of these bearings. In case of intensive use in
difficult conditions (mud, water), it is useful to increase the amount of grease.

<<< Back to the boutique

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