The profile of the teeth has been completely reworked according to the principles of the Ultra-Drive project, allowing extremely fast response during shifting. The synchronisation, achieved by developing a specific position of the teeth of each pinion, allows a smooth and rapid change from one transmission to the other. And in order not to lose any of the stiffness, the last two sprockets are mounted on an aluminium frame.
Special sprocket phase adjustment for fast and precise shifting results in less stress on the chain.
ULTRA-DRIVE DESIGN teeth
Optimised downshifting under load.
NICKEL-CHROME SURFACE TREATMENT
Reduces the friction between sprocket and chain - increases the durability of the sprockets.