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Old 05-14-09, 07:43 AM
  #15  
rhm
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Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...

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Originally Posted by Hydrated
I had to go check this out myself... because I know that my '84 Trek 520 is made with 501 tubing. You had to go up to a 620 or 720 to get a 531 tubeset. I couldn't find the specs for the '85 model year 520, but I found that Trek used 531 tubes in the 520 for the 1986 model... so the 520 began to use 531 in either 1985 or 1986... and went through 1988.

The 1989 is listed as using TruTemper TR tubes... so it looks like the 520 was made with 531 for only 3 or 4 years.
Thanks! That being the case, would we be right in thinking those years are the best ones for Trek 520's?
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