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
|Chain line (mm)||43.5|
|Chain ring combination||55-42T, 54-42T, 53-39T, 52-36T, 50-34T|
|Compatible chain||HG-EV 11-speed, HG-X11|
|Crank fixing bolt included||No|
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