Thread: Help Identify This Vintage French 650B Randonneur
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Old 05-08-14 | 11:11 AM
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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...

Originally Posted by juvela
Originally Posted by Grand Bois
Not necessarily plain guage. My PX10 takes a 26.4.
that is because your PX-10 comes stock with a Juy pillar which does not run true to nominal.

actual size is likely 26.6.
But the point is, Catnap's measurement of the seat post diameter tells us nothing beyond the seat post diameter.

I have a Jeunet that takes a 26.2 and an Astra that takes 26.4. Both are French bikes made from butted Reynolds tubing. Based on the seat post size, we cannot conclude anything about the tubing.
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