how do i find the bb size of my circa 1992 trek 800. I wanna upgrade the crank and also the bb.
I indiabiker · Registered Joined Aug 24, 2010 · 3 Posts Discussion Starter · #1 · Aug 24, 2010 how do i find the bb size of my circa 1992 trek 800. I wanna upgrade the crank and also the bb.
Industry_Hack · Total noob (& forum admin) Joined Aug 15, 2009 · 12,350 Posts #2 · Aug 24, 2010 Remove it, and see what it says inside. Unless you have some really big calipers.