The Shimano CRM85 XT 1X 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
Featuring Shimano DYNAMIC CHAIN ENGAGEMENT+ chainring technology that has fully optimised the chainring teeth profile to give you better chain retention and smoother pedalling 
Designed to work with Shimano’s 12-speed HG+ chain providing more efficiency and improved power transfer
Genuine Shimano replacement chainrings for the FC-M8100, M8120 and M8130 1X cranksets available in 36T, 34T, 32T, 30T and 28T manufactured with steel (teeth)/CFRP (body) and aluminum (arm) for increased durability
Shimano part numbers: 36T - SMCRM85A6, 34T - SMCRM85A4, 32T - SMCRM85A2, 30T - SMCRM85A0, 28T - SMCRM85Z8
Compatible chain Shimano HG+ 12-speed
To fit the chainring to the crank arm you will need to use the specific Shimano tool TL-FC41 front chainring direct mount tool