Of course French city bike technology exploded during the Occupation. There was no gasoline, and people spent their transportation budgets entirely on custom bicycles from Paris shops like Herse and Singer. There were also French Jews hiding in the shop basements and building those frames...
you can get both 650A and 650B rims (and quality tires) from Japan - pretty sure you're asking about 650A
I also believe the Sun rims I linked to are the CR18 you're asking about
btw, it wasn't that DeDion ever produced sports car suspensions, considered them, or even used the suspension design in their own automobiles
Bouton designed it to make a tricycle roll-proof.
The dead axle rear suspension produced such high roll center (SAE racing barstools) for such low...
thanks - and the last good photo I took of the bike, sporting her winter bar bag for peeling and stuffing layers as the day warms, taken on a last-March bluebonnet greenway foray.
also due for a new handlebar wrap, which I have some white leather bar wrap stashed away
without trying to totally hijack this great thread, ceramic is microscopically smoother and much more homogeneous than steel (no texture or 2nd-phase particles of any kind). Ceramic balls should smooth out asperities on the steel surfaces, and without grooves to dig new ones.
I just reported on my first 7000+ mi run with loose-ball ceramic in steel cup-and-cone.
When I searched ceramic bearing on the forum, you and I have the only posts about ceramic bearings in the entire archive.
Decided to add to my old thread.
The frame, btw, which I paid $175 on ebay, is actually a DeRosa Primato with Moser graphics - quite a steal at my price. The DeRosa-marked frame would sell for a lot more than I have total in the bike.
Since my photo above, finally gave up on the Rivet saddle...
That's quite a thumper.
Through the 50s, DeDion was the only rear suspension used in Formula 1.
Even though the suspension was designed by Bouton, DeDion has always received the credit for the patents.
the WM serial number is Raleigh, Worksop-built, M= September, first digit will be the year (70s).
I believe you have a Gran Sport with the original fork, Raleigh-made fork crown and lugs, and of course, not the original components.
you guys are getting all catalog nerdy over an obvious lived-with bike.
A pretty bike I'm glad doesn't fit me so I don't have to covet.
From the rear drop-outs to the fork, the frameset really matches Raleigh Super Course in grade.
My bet, the bike was delivered with the (a) Huret drivetrain...