EXI Bottom BracketAllows the use of a 24mm spindle X-Type or EXI crankset in a PF41 (Shimano Press Fit) bottom bracket shellPrecision CNC machined and anodized aluminum alloy cups are more accurate, durable and stableRubber seal located on the bearing's external side helps to reduce the risk of water penetrationInstalled using a standard bearing press toolItem SpecificationsBB Shell Width (mm)121BB/Frame InterfaceBB121Bottom Bracket Shell I.D.41Defined ColorBlackSpindle Interface TypeFSA MegaExoSpindle Interface TypeFSA MegaExo LightSpindle Interface TypeRaceFace EXISpindle Interface TypeShimano Hollowtech II RaceFace EXI Bottom Brackets UPC: 821973349435