Truvativ TruShift 8/9sp Mtn Aluminum Chainring. Features: 7075-T6 aluminum construction with a blast-black hard anodized finish for 2/3x drivetrains Inner (64mm BCD) rings are 8-10sp compatible with 2x10sp X0/X9 (AM) offerings Middle/outer rings have TruShift pins and ramps Specifications: Teeth: 22T, 24T Ring Type: 3x (Inner Ring) Mount Style: 4-Bolt BCD: 64mm Offset: N/A Speeds: 8-10 speed Shape: Round Material: Aluminum Weight: TBD Color: Black