Wheels Manufacturing's PF30 Outboard bottom bracket will give you all of the same benefits as their well-loved Outboard style bottom brackets. The two machined aluminum cups thread together ensuring the bottom bracket remains stable in the frame, increasing bearing life, and simplifying maintenance. This means no more creaking, smoother operation, longer bearing life, and really quick bearing replacement. Features: Converts non-threaded 46mm press-fit bottom bracket shells to accept most 24mm spindle cranks For 24mm (Shimano, FSA, Race Face, etc) for installation into PF30 frames without the need for adapters Includes anodized aluminum cups with Enduro sealed bearings Base: Enduro ABEC 3 sealed bearings Specifications: Frame Interface: PF30, Specialized Carbon OSBB Spindle Interface: 24mm (Shimano Hollowtech II, FSA MegaExo, Surly OD, FSA MegaExo Light, RaceFace EXI) Bottom Bracket Shell ID: PF46 Shell Width: 68mm 73mm Bearings: Enduro ABEC-3 Color: Black Weight: 153g