The Shimano Tiagra FC-4703 is a 3x10 speed crankset with 50-39-30T chainrings and an optimal balance between stiffness and light weight. It is available in 165, 170, 172.5, and 175mm crankarm lengths. Features: Shimano FC-4703 Tiagra Triple Chainset 10-Speed Taking many features from pro-level equipment, this 2-piece cap-free design Tiagra chainset offers unbeatable performance 2-piece cap-free design is quick and easy to install whilst being lighter and stiffer than a traditional crank/ bottom bracket assembly SG-X chainrings feature strategically placed chain pick-up pins and tooth profiles to ensure fast and positive shifting Designed to work with HollowTech II type bottom bracket cups Specification: Compatible with 10-speed HG-X chains Anodized aluminium crank arms Lightweight aluminium chainrings Q-Factor - 158.8mm 4 arm, 110 mm bolt circle diameter