Ask a Mechanic | Best Bottom Bracket Adaptor Ask a Mechanic | Best Bottom Bracket Adaptor Daniel2015-12-16T15:46:20-08:00 Question: George wants to know: I am installing a Shimano crankset on a PF30 Ask a Mechanic | Best Bottom Bracket AdaptorDaniel2015-12-16T15:46:20-08:00