I've got a Trek with BB90 (2015 Boone). The NDS bearing is shot and I thought it was a good opportunity to upgrade to a thread-together BB (similar to a Token Ninja).
Popping out the existing bearings was easy, as was removing the BB sleeve. So far so good. Cleaned the shell real well but when I went to put in the new thread-together BB, it's obvious that the OD of the threaded sleeve is too big and it will not go into the BB shell. It's not close; the BB threaded sleeve is 37mm but the shell ID is ~30mm.
I'm wondering whether there is another piece that I need to remove from the BB shell in order to install the BB? Obviously this is no issue for OEM (in my case, GXP with the press fit bearings) or even running a crank with 30mm spindle, but has any other Trek owners needed to remove anything else besides the old bearings and sleeve in order to install a thread-together BB?