The choice of the world's best climbers, sprinters, and time trialists, the Dura-Ace R9100 chainring drops weight while maximising power transfer.
The new design, and its iconic look, is adapted for race specific disc brake systems.
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
Adapted for race specific disc brake system
Rider tuned gearing options