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Old 06-11-11, 05:11 AM
Thrifty Bill
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Join Date: Jan 2008
Location: Mountains of Western NC
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Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more

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Measure geometry. Once a bike gets repainted and the components changed, what it is, is no longer what it was. The geometry on the touring bikes was different, and is listed in the catalog. IDing a bike whose components have been changed, and with its decal and paint removed, is challenging.

But to your original list, it is kind of easy. It is none of those models, as Trek did not make any of them in 1980. Road bikes were the 410 series (412 or 414, I have had a lot of them). Also had a high end 730 and 930 road bike. 510, 710 and 910 were the touring models.

A tape measure will tell you which configuration it has, if it is a touring model, it will not tell you which one. Disassemble and look for a possible mark on the fork crown if you have to know, most are marked (not with Trek model, but with the tubing brand).

Last edited by wrk101; 06-11-11 at 05:18 AM.
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