Old 09-23-21, 09:56 AM
  #3  
canopus 
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Here is the info for your trek 520, what year is the 640? Standover height will be affected by wheel size and tires.
You can look this up at the Vintage Trek site. https://www.vintage-trek.com/


1989 Trek Chromoly frames.
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1984 Cannondale ST
1985 Cannondale SR300
1980 Gary Littlejohn Cruiser
1984 Trek 760
1981 Trek 710
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