The embargo on the Shimano Dura-Ace 7900 finally ended on the first of June. A lot of pictures can be found online now.
The Shimano Dura-Ace 7800 groupset satisfied a lot of users over the last 5 years. This is quite long, particularly compared to the italian competitor, but it is as well synonym of high
quality and reliable components. We hope the 7900 will keep this line.
Let’s have a look some minutes at the news featured with this high end new generation groupset:
The complete 7900 groupset:
Shimano still doesn’t switch to a carbon crankset. According to the japanese manufacturer, the only way to make the best lightness to stiffness ratio crankset is to use aluminium. The
Briefly, from a technical point of view, the features concern the chainring which is hollow, and the hollow crankarms whose thicknesses have been optimized. Shimano claims a nice 20% extra
Those cranks will be available in compact and standard.
Regarding the aesthetics, this component looks quite good. The slender lines and the double color, although looking a bit weird at the first look, finally is pretty.
The derailleurs are completely redesigned. Their lines are matching the crank arms and the rear one even is featuring a carbon rear mech. The technical modifications concern the following
On the scale, the rear is about 166g, the front one is 68g, which are respectively 16g and 6g shaved off from the 7800 version.
We do not have a lot of things to add about the levers: they are indeed made out of carbon, the cable housings will pass under the bartape, either in front of the bars, either behind as
In term of look, the levers are quite flashy: half black, half silver, they match the derailleurs and the crankset but the shades look rough, they probably deserved more.
The chain of the Dura-Ace 7900 groupset is redesigned: the plates’ contact with teeth is improved to reduce friction and noise at the same time. Shimano claims a better durability too.
Weight save and power rise have to be expected here too: the new compounds bring 20% more braking power on dry conditions, and 100% more under the rain! Moreover, the levers geometries are
More information: Dura-Ace