Shimano XTR M960 ChainringsChainrings from Shimano HollowtechII & Octalink MTB cranksets have different length tabs & are not interchangableItem SpecificationsColorBlackMaterial7075 AlTeeth44teethBolt Pattern4-BoltChainring BCD146mmRing PositionOuterChain Compatibility9-SpeedDefined ColorBlack