Campagnolo Super Record 11 Outer Chainring Bolt Pattern: 5-Bolt, 4-ArmChain Compatibility: Campagnolo 11Chainring BCD: 135mmChainring BCD: 135mmChainring Speeds: 2x11spChainrings Material: 7075 ALChainrings Material: 7075 AluminumComponent Color: GreyPosition: OuterTooth: 53t