Shimano 105 FC-5800 11 Speed Double Chainset 53-39T Black

The Shimano 105 FC-5800 HollowTech II Chainset ensures weight is kept to a minimum thanks to the hollow design of the forged and anodised aluminium crank arms. The teeth have been designed to work specifically with HG-X 11-speed chains to increase contact providing you with optimized efficiency and improved power transfer. This Shimano chainset allows for the use of larger bearings and increased axle diameter because the bottom bracket bearings can be spaced wider apart. This system offers you easy to installation, adjustments and maintenance. Shimano 105 5800 CompactHollowTech II Chainset Features Lightweight HollowTech II 105 11-speed chainset Innovative HollowTech forged and anodised aluminium crank arms utilise a hollow design that minimises flex and keeps the weight low The chainring teeth have been developed to work in conjunction with HG-X 11-speed chains for increased contact to provide greater efficiency and improved power transfer 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