Ultegra is “pro-proven” as it is a direct trickle-down from the Dura-Ace groupset.

• Optimized lightweight crank arm design produces excellent power transfer
• Minimized weight without sacrificing stiffness
• Rider tuned gear performance through various gear combinations
• Redesigned FC for greater frame compatibility
• Wider gear pitch increases clearance between chain and leading teeth
• Hollowtech II crank construction
• 2×11-speed