System engineering at its peak. Each of the components magnifies the qualities of the others for an unparalleled level of performance. Optimizing input to maximize output. That's how it achieves supremacy.

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System engineering at its peak. Each of the components magnifies the qualities of the others for an unparalleled level of performance. Optimizing input to maximize output. That's how it achieves supremacy.

Features:

BOTTOM BRACKET WITH SMALL BALL BEARINGS FOR LIGHT WEIGHT
ADVANCED SEAL CONSTRUCTION FOR SMOOTHER ROTATION

Specifications:

Series:Dura-Ace R9100

Shell Width: 68mm/70mm

Frame Compatability: English Threaded



  • Compatible with all Shimano road cranks featuring integrated axles ( 24 mm)
  • Enhanced sealing system for reduced friction
  • BSA thread: 1.37 x 24 tpi
  • Italian thread: 36 x 24 tpi
  • Shell width: 68 mm (BSA), 70 mm (Italian)
  • Hollowtech II: superior stiffness, light weight, and improved power transfer via secure axle-crank connection
  • Material: anodized aluminum, carbon fiber-reinforced plastic
  • Approximate weight: 65 g

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