Spirex
Raymond Bon was the clever Parisian designer of the Spirax derailleur
system, one that evolved & improved from the early 1930s into the 1960s.
6.16.2022
“(Spirax derailleurs) were designed as touring deraileurs, with a large capacity of 38 teeth. …(snip)…I have one on my 1951 Raymond Valance, and it’s performance is remarkable, much better than my Nivex-equipped bikes, which in turn are better than my Cyclo-equipped bikes.”
Gary DellaRossa on the Classic Rendezvous Google group.
NOS Spirax shifting set
on eBay by seller kirvesmies
Have you a vintage bicycle with Spirax derailleurs?
We’d love to have some good pictures of that set up.
Please contact the webmaster
