Thread: old trek 520's
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Old 02-08-07, 10:11 PM
  #7  
jens5
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Reynolds Tubing

Actually Reynolds 531 would be imo,(and many others), the superior tubing as it's butted, seamless tubing made of Manganese Molybdenum,which is superior to standard Cro-Mo.
The 501 is generally strait gauge drawn and is seamed. As the 501 is thicker walled it, was heavier than 531 as well. It was used as the cheaper alternative to 531 on some Budget bikes and the Trek 520 as a cost saving measure between 1983 and 85. IMHO, nothing rides like 531.
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