The bearings are the same as BB30 bearings. But the BB also includes the external cups, which is the magic bit, together with the dust seals. If you know what you're doing you can press the bearings out of the BSA30 bearing cups and press new ones in.
The bearings are the same as BB30 bearings. But the BB also includes the external cups, which is the magic bit, together with the dust seals. If you know what you're doing you can press the bearings out of the BSA30 bearing cups and press new ones in.