Originally Posted by
Aubergine
Actually, at least with Stronglight, Nervar, and Spécialités TA cranks, the marks D and G (droit et gauche) do signify French threads. Those cranks use R and L for English threaded arms.
I've never seen a TA crank with D or G. They usually have a W (for 9/16x20) or nothing.
The Stronglights I have either say 9/16x20 - or nothing.
I have Nervars with BSA stamped on them.