The choice of the world’s best climbers, sprinters and time trialists, the R9100 DURA-ACE crankset reduces weight while maximizing power transfer. The new design, and iconic look, is tailored for race-specific disc brake systems, while still offering a wide range of gearing and crank arm length options.

Features

• Optimal power transfer
• Better balance for lighter weight (- 7 g) and efficiency
• Newly designed crank arm
• Maintains high stiffness and reduces weight
• HOLLOWGLIDE
• 4-arm crank set
• Adapted for race specific brake system
• Shorter rear hub length with O. L.D. of 135 mm
• Redesigned gear tooth profile to accommodate wider gear pitch
• Tailor-made shifting options
• Flagship design

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