I have this Isis BB on my trek session 77 frame its rusted on and won't come off IVe soaked it in dp60 rust solvent I have taken the drive side off and also I hammered off the spindle to see if I could do anything there It uses the square taper BB shell
by aabelstudiosyt
2 Comments
https://www.youtube.com/watch?v=IXBiIbRTP7w
Grab the ol trusty propane torch. Freeze spray or dry ice is almost as fun to play with as fire and may work as well. Different metals expand and contract at different rates so heating/freezing can break the rust bond.
The second photo explains a lot 😉