The 5Dev T-Type Aluminum Chainring is CNC machined from 7075 aluminum, a material that holds its tooth profile under the chain loads trail, enduro, and downhill riding generate without adding weight to the build. What Our Gearhead(R) Experts Are Saying:"The SRAM T-Type, Eagle, and Shimano 12-speed chain compatibility means this ring fits the majority of modern MTB drivetrains without a second thought about whether it will work with what's already on the bike."