Originally Posted by
bikemig
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.
That's good to know. What brakes are you using? My Mafac Racers are definitely serviceable and figured I would stick with them.