The Bottom Bracket Adapter allows you to install a standard external bearing into a BB30 or PF30 frame. This adapter works by allowing you to thread your BSA BB into the adapter, then simply press the adapter cups into the frame, GXP cranks on a BB30 or PF30 frame. - BB adapter type: American to Euro, BB30 to English/BSA, PF30 to English/BSA 68/73mm, PF30 to English/BSA 83mm
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