The choice of the world's best climbers, sprinters, and time trialists, the Dura-Ace R9100 crank drops weigh while maximising power transfer.
The new design, and its iconic look, is adapted for race specific disc brake systems while still offering a wide range of gearing and crank arm length options.
HollowTech II - The concept of HollowTech II technology is focused on producing a superior crankset which will maximise a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.
- Best balance for lighter weight (-7g) and efficiency
- Maintains high rigidity and reduces weight
- Shorter length of rear center with O.L.D.135mm
- Optimum power transfer
- Iconic design
- Adapted for race specific disc brake system
- Rider tuned gearing options