The 5Dev T-Type Aluminum Chainring is CNC machined from 7075 aluminum, holding its tooth profile under the chain loads trail, enduro, and downhill riding put through a drivetrain across the full service life of the ring. What Our Gearhead(R) Experts Are Saying:"The SRAM T-Type, Eagle, and Shimano 12-speed chain compatibility covers the modern MTB drivetrain field, and the 8-bolt mount locks this into the 55mm chainline setups where the 3-bolt doesn't reach."