The SRAM S1000 Eagle T-Type direct mount aluminum chainring is bash guard compatible and available in three different tooth counts. Specs: Rear Speeds: 12-Speed Chainring Size: 30t, 32t, 34t BCD: Direct Mount, 8-Bolt Offset: +3mm Chainring Material: Aluminum Model ID: CR-TTYP-DM-A1 Compatibility: SRAM's S1000 Eagle Transmission Chainring is compatible with the following: T-Type & Eagle Chains 8-Bolt Crank Arms GX / X0 Eagle Transmission Chainring Bash Guards SRAM Transmission T-Type chainrings and cranksets are backward compatible with Eagle chains.