Joined: Jan 2008
Posts: 23,645
Likes: 1,109
From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
Post a picture of both sides of your bottom bracket. Lots of variation in styles used by Trek back then.
And unless you bought this bike brand new and know it.s history, there is no way for any of us to know whether that bottom bracket is original or not. Many of us on this list are routinely "borrowing" parts from one bike to the next, upgrading other bikes, and so on. Often vintage bikes do not have the original parts on them. A picture will help either way.
Last edited by wrk101; 11-27-09 at 06:36 AM.