Thread: Cold setting risks
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Old 06-21-21 | 02:57 PM
  #6  
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bikemig
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Originally Posted by TullySteve
I think you are correct about all 531 tubing (decals all gone but catalogs that I've found online show either 531 main tubes or all 531). No visible cracks or defects. Thanks.
531 main tubes if a '72; main tubes and fork by '73. Who knows what the rear triangle was made of but it wouldn't surprise me if it were hi tensile steel.

By the way, you can fit a pretty fat tire if running 700c. I'm running 700 x 35c Schwalbe Mondial tires on my '73 Motobecane Grand Record.
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