Shimano tiagra 4650 compact 10sp chainsetsporting many features from pro level equipment this 2 piece cap free design tiagra chainset offers unbeatable performanceplease note bottom bracket is not included features 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 holl