Originally Posted by
never_recover
Edit: sorry I see you already left your bike to the shop... so my opinion is now irrelevant, just ignore what I said..
I'll be the contrarian and suggest you keep the BSA adapter and get a BSA crankset, your post clearly make it sound like you have been completely satisfied with it and the advantages of BB30 are marginal (at best)... What you risk is to get the dreaded creaking sounds if the BB is any less than perfectly installed..
There's a reason Shimano doesn't do a BB30 crankset and it's not only because of the NIH (not invented here) syndrome... If Shimano engineers believed that pressed-in BBs are a good idea they would have done their own version and fix the existing issues while they're at it (just like they did with Octalink vs. Isis)...
And a shop that can remove a pressed sleeve with ease (makes it sound like they do this routinely) but does not have a BB on hand.. bad smell..
I believe what you wrote is a pretty valid counterpoint and not widely understood by many. But now Shimano because of industry pressure has relented and has created a Press Fit BB for their DA crank, for the record...for wide shell press fit applications that are compatible with the long spindle length normally suited for external bearings. So they have stepped up. No they didn't change their 24mm spindle OD, nor should they. I agree that 99.99% of all riders, couldn't tell the difference between DA and any 30mm BB30 crank....many would prefer in fact the shift performance of DA because of their rigid ring design.