- New four arm hollowtech-II design is stiffer and lighter than traditional five arm designs
- Re-inforced construction around chainring area for improved stiffness to weight ratio
- Shimano Cold Forged crank arms
- Cranks use same 110mm asymmetrical BCD for all chainring combinations available
- Chainring options: 34-50t, 36-52t, or 53-39t
- Crank Arm Length options: 165mm, 170mm, 172.5mm, 175mm
- Available in Black or Silver
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