Originally Posted by uciflylow
If I understand correctly. The cups will have a tendancy to unscrew opposite the direction of crank rotation? If so, they are indeed in "reverse", I didn't relize that Trek had made some like this in the past.
Thank's for the help all, it has been a learning experence to say the least!
The standard BSC BB threading is Right-hand on the Non-drive side and Left-hand on the Drive side. Trek didn't make the reversed BBs, Shimano did, Trek is just the only brand I ever saw them used on, but I'm sure others did use them, too. If you ever see one, it'll typically be a cheap steel cartridge unit and instead of UN-something it's labeled L-something. What Shimano was thinking I'll never know, I just hope they all end up composted, real soon...at least they're off the market now,
AFAIK. If you want to learn right, start with Sheldon Brown's articles, then visit the Park Tool pages.