The Shimano FCMT510-1 Deore level 12 speed single chainrings are the perfect replacement for worn or damaged chainrings Shimano's class leading chainrings offer the optimum balance of light weight and rigidity for precise shifts even under high loads Designed to work with Shimano’s 12-speed HG+ chain providing more efficiency and improved power transfer Genuine Shimano replacement chainrings for the FC-MT510-1 1X cranksets available in 32T and 30T manufactured of steel construction for increased durability Shimano part numbers: 32T – Y0L332000, 30T – Y0L330000 Compatible chain Shimano HG+ 12-speed