The Shimano DURA-ACE drivetrain is perfectly balanced for improved performance. All components are part of an integrated system for optimum power transfer, including the vast array of gearing choices to perfectly match your riding style and needs. Repeatedly tested for maximum efficiency on all terrains, under all conditions.
Crank Construction : Shimano HOLLOWTECH II technology
Crank Arm Length : 165, 167.5, 170, 172.5, 175, 177.5, 180mm
Bottom Bracket : BB-R9100
Average Weight : 621g (53-39T)
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