Lew Racing, M5 [en]

Paul Lew known for his 880g wheelset, retails since a few weeks, some super light rims. Their aspect is very rough, but they have strong arguments to face the competitors. The spoke tension resistance is up to 200kg, simply two times higher than the limit spoke tension some other rims can accept, such as the Zipps for example… The carbon/boron braking surface accepts standard brake pads which is a good point. Then, the weight/height ratio is unbeatable, much better than any other rim manufacturer, just have a look below…

Here is a small table to compare the three main rims of the same depth in the current market :

Model (tubular) Weight Height Max. spoke tension
Lew PRO VT1 290g 46mm 200kg
Zipp 285 320/340g 44mm 100kg
Corima Aéro 375g 45mm 150kg

It’s obvious, the Lew rims are deeper than the two others and remain way lighter and more resistant too. The profile is a simple triangle, like the Corima Aéro for example. These rims should be, in theory, slower than the Zipp 285 that are curved and dimpled.

Click to enlarge.

Our rims hit the scale at only 277 and 285g
We will thus be able to build, easily, a set around 950g with an M5 front hub (33g) and a Tune Mag150 or 160 rear one (from 160 to 170g). The M5 rear hub quality was excellent, but it was heavier than expected with 193g. So bad.
The rims are at this time available only in 16 and 20 holes. The drillings are quite low, so we will certainly need a high bracing angle and large spokes to get a good stiffness. So the hubs will need the flanges far from each other and, some round 2mm or double butted 2/1.8mm spokes will be required.
So, in concrete terms, our build will use Cx-ray for both the front wheel and the drive side spokes, while the non-drive side will have standard and stiffer spokes.
In approximately 5 weeks, the rims will be available in any drilling.

About the finish, it’s worse than what we were expecting. The rims are not very well finished, particularly for the rim bed where the tubular gets stuck. Thus, the rims will be much nicer with a stuck tube, ready to roll!

Click to enlarge.

A wheelbag is provided with a set of rims. They have a pocket to place some tools such as a valve extender, a spoke key, etc.

The price for a rim is 700 euros in France, $US800 in the USA.

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