Shimano tiagra fc4603 10sp triple chainringssporting many features from pro level equipment this 2 piece cap free design tiagra chainset offers unbeatable performancefeatures2 piece cap free design is quick and easy to install whilst being lighter and stiffer than a traditional crank bottom bracket assemblysg x chainrings feature strategically placed chain pick up pins and tooth profiles to ensure fast and positive shiftingdesigned to work with hollowtech ii type bottom bracket cupscompatible