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 compatible with 10 speed hg x chains anodized a