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- Innovative HollowTech forged and anodised aluminium crank arms utilise a hollow design that minimises flex and keeps the weight low
- HollowTech II allows the bottom bracket bearings to be spaced wider apart, enabling the use of larger bearings and an increased axle diameter
- Can be used with Shimano external or press-fit bottom brackets
- The system allows for easier installation, adjustment, and maintenance
- Lightweight anodised SG-X aluminium chainrings for smooth and precise shifting