Technical Q&A with Lennard Zinn – Stripped threads, drain holes and a great new tool
Those dang stripped threadsDear Lennard,What if anything can be done when the threads of a bottom bracket shellon an aluminum insert are stripped? I have not seen the bike firsthandbut I am trying to help someone out. They say that there is not enoughmaterial to cut new threads in. I assume that a tap has been runthrough already with no success. Is there any hope? I don't knowwhich side is stripped but if it is the non-drive side I can assume itis less critical. Is there a bottom bracket that will work better in thiscase?This is an old Look carbon time trial frame.JasonDear Jason,You