French pedal threads?

[kaiser]

Came across this in an ebay listing and I've never heard of it before. Whats the deal? Are pedals easy to get and such?

 

[Midlife]

Below is from Sheldon Brown.........French pedals / do come up but not very often.

Shaun


Thread Sizes
Most pedals have 9/16" x 20 tpi threads.
Pedals for one-piece cranks are 1/2" x 20 tpi.
Older French bicycles used a 14 mm x 1.25 mm thread, but these are quite rare. French-threaded pedals are commonly labeled "D" and G" (French for "droite" and"gauche" (right and left). A French pedal will start to thread into a 9/16 x 20 crank (and vice versa), but will soon bind. Do not force it, or it will damage the crank. Aluminum French cranks are easily rethreaded to 9/16" x 20 TPI.
In the early 1980s, Shimano attempted to popularize a very large thread size, called "Dyna Drive." This system was designed to place the pedal bearing inside of the crank, so that the foot could be slightly below the pivot point of the pedal bearing. This was believed to offer biomechanical advantages, but the system was not a commercial success, and has been abandoned.
Pedal Threading
One-piece (American) Cranks 1/2" (0.50") x 20 tpi 12.7 x 1.27 mm
Standard-3-piece cranks 9/16" (0.56") x 20 tpi 14.28 x 1.27 mm
Old French 0.55" 20.32 tpi 14 mm x 1.25 mm

 

[Ian Raleigh]

All depends on the type of pedal really! Quill/toe clipped versions can be readily found but very rare to find LOOK pedals with French thread.

 

[lewisfoto]

Pedals are fairly common if you look for French makers like Lyotard. But as Shaun notes from Sheldon's page French thread cranks are easily tapped to English. Also with French cranks like Stronglight/TA the crank puller is different.

Steven

 

[Ivo]

All depends on the type of pedal really! Quill/toe clipped versions can be readily found but very rare to find LOOK pedals with French thread.

Depends where you look for it. A search on 'filletage français' on French ebay will give you a few hits, or use the official marking 14x1.25

 

[kaiser]

Thanks all, it was a chainset (Stronglight item) that I fancied for a mtb, complicates things too much to bother with. Interesting info though

 

[Ivo]

Thanks all, it was a chainset (Stronglight item) that I fancied for a mtb, complicates things too much to bother with. Interesting info though

Any decent bikeshop could rethread the chainset for you.

 

[Dead Rats]

I could re-tap them to 9/16" standard for you, for postage