FSA Pro Road chainring, 130BCDx39T(double) black Bolt Pattern: 5-BoltChain Compatibility: 9-Speed,Campagnolo 10Chainring BCD: 130mmChainring BCD: 130mmChainring Speeds: 10spChainring Speeds: 9/10spChainrings Material: 7075-T6 AluminumComponent Color: BlackPosition: InnerTooth: 39t (double)