Shimano 105 5800 Chainset, unisex adult, 105 5800, black, 34/50 172,5 mm

• 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

Optimum energy transfer The 4-arm Dura Ace and Ultegra design shows the best balance between stiffness and light weight. Works with the new chain guide of the chain hoist to reduce chain jumping. New reinforced plate construction to maintain balance between weight and stiffness. Wide switching range: 50-34T, 52-36T, 53-39T