Thread: Did Trek make a model 531????
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Old 01-21-12 | 09:51 PM
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hxzero
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Joined: Jan 2008
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From: Long Beach, CA

Bikes: 1996 Bianchi EL/OS, 1991 Miyata QuickCross

All signs point to it being a 1987 560 Pro Series. Check out the catalog: http://www.vintage-trek.com/images/t...rekCatalog.pdf

As it turns out the tubing is Reynolds 531.
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