Pat Moffat wrote:
> I recently acquired a Trek road bike, and using the Trek web site, I
> have tried to Identify the model. The serial number is 071159 which
> makes it a 1983. It also has the Tim Isaak designation 58TSI, both
> stamped on the BB shell. It is bright red with 'TREK' in white on the
> down tube and 'USA' in white on the seat tube near the BB shell. There
> is no model number on the bike. The paint is in very good condition, so
> I'm sure it hasn't rubbed off. It has Campy drop outs and it has a
> Columbus SLX transfer at the top of the seat tube. It has a Look carbon
> fiber fork. I'm sure it was originally kitted with Super Record
> components...it still has an SR f. der. and the 105 brake set that
> currently hangs on the bike still has the original Campy star washers.
> I couldn't find any Trek listed with Columbus SLX tubing. Any ideas????
The SLX decal is a later addition; Columbus SLX tubing didn't exist when that frame was made. The "58TSI" marking on the shell does in fact indicate that this frame used one of shells Tim Isaac designed for Trek and is consistent with a 1983 frame. The 58 represents the nominal frame size for which the shell was designed. IIRC there were only 3 sizes made: 54 for 52cm and 54cm frames, 58 for 56-58cm frames, and 60 for 60-62cm frames. The seat lugs have similar markings on the inside of the seat stay sockets.
If the frame has Campy 1010B dropouts (as opposed to 1010 dropouts with eyelets or double eyelets) you have either a 770 frame (Reynolds 531) or 970 frame (Columbus SL for sizes up to 58cm, or SP for sizes larger than 58cm). The fact that the SLX sticker is there makes it difficult to say what the tubing actually might be. Columbus steer tubes have the dove logo stamped into them which makes it easy to identify, but it appears you don't have the original fork.
But it's a nice frame! I worked on a lot of those when I was at Trek.
--
-John Thompson (john@os2.dhs.org)
Appleton WI USA