Thread: 1986 Trek 560 = Solid Fixie Conversion?
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Old 03-10-09 | 01:42 AM
  #79  
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Originally Posted by JohnDThompson
No, Skyrocker had it right. The first digit indicates the frame material "5xx" used Ishiwata 022 tubing,
My '87 560 Pro has 531. Did Trek change things in '87 or is it because it's a "Pro" model?
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