FSA DH/SS MTB 38t 104mm Chainring 3mm Thick Black ARM x BCD: 4x104mmBolt Pattern: 4-BoltChain Compatibility: 9-SpeedChainring BCD: 104mmChainring Speeds: 8/9spChainring Speeds: 9spChainrings Material: 7075-T6 AluminumChainrings Material: AL7075/T6 AlloyComponent Color: BlackPosition: SingleTooth: 38t