Originally Posted by
atwl77
I was just thinking of a 48-32 today, but I didn't realize there might be issues like needing to change bearings? Or is this specific to BB90? My bike's a PF30, and like the OP, I would also be interested in a solution that requires minimal tweaking so that I could easily go back to my current 53-39 whenever I like to.
I like the GRX suggestion, if it would work ok??