The choice of the world's best climbers, sprinters, and time trialists, the DURA-ACE R9100 crank drops weigh while maximizing 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.

Specifications
Lengths: 165 mm, 167.5 mm, 170 mm, 172.5 mm, 175 mm
Combinations: 55-42T, 54-42T, 53-39T, 52-36T, 50-34T
Chainline: 43.5mm
Q-Factor: 146mm
Hollowtech II spindle

Mfr Claimed Weight
614g (50-34T)