Shimano 105 FC-RS520 double 12-speed chainset -50/34T - Black (170mm)

Description Lightweight 12-speed 2-piece design chainset Innovative forged and anodised aluminium crank arms for minimum flex The chainring teeth have been developed to work in conjunction with Hyperglide 12-speed chains for increased contact to provide greater efficiency and improved power transfer 2-piece design 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 aluminium chainrings for smooth and precise shifting Colour - Black