Originally Posted by
tradtimbo
I just did this, and it worked great:
If you have a steel frame thats been sitting around awhile that you want to build, the BB shell might have some rust in it that have deformed the threads a bit. Chase the threads with old BB cups. Go slow and use some light lubricant. all ready for a new BB!!!
Was it a steel or aluminum cup you used for chasing the threads? Or perhaps plastic (like the cheaper Shimano BBs)?