WHEELS MFG BB30 Conversion Bottom Bracket GXP

This adapter is required if you want to install SRAM/Truvativ GXP cranks on a BB30 frame. In case you are wondering, a BB30 spec frame has a 42 inner diameter BB shell and a Pressfit 30 frame has a 46mm inner diameter BB shell. Made from lightweight Delrin. Does not include bearings so order those if you don't already have them.