Wheels Manufacturing PF30 Outbound bottom brackets are for use with frames that utilize a PF30 bottom bracket standard. Features two machined aluminum thread together cups that keeps the bottom bracket stable in the frame, increases bearing life, and simplifies maintenance. This means no more creaking, smoother operation, longer bearing life, and quick bearing replacement.Note: Spindle length must be 103mm or longer when used in a 68mm wide shell, 108mm or longer when used in a 73mm wide shellEnduro ABEC-3 sealed bearings are replaceableGrade 10 chromium steel balls, 52100 High Carbon Chromium Alloy Races provide smooth crank rotationMachined aluminum cups with durable anodized finishFits frames with 61mm* to 83mm bottom bracket shell width (* Specialized Carbon OSBB with 61mm shell width will need additional cup spacers)Made in the USAItem SpecificationsBB Shell Width (mm)61BB Shell Width (mm)68BB Shell Width (mm)73BB Shell Width (mm)83BB/Frame InterfacePF30BB/Frame InterfaceSpecialized Carbon OSBBBottom Bracket Shell I.D.46Defined ColorBlueSpindle Interface TypeRaceFace Cinch 30mmWeight151 Wheels Manufacturing PF30 Outboard Thread Together Bottom Bracket Bottom Brackets UPC: 810124712280