Hey guys... Does anyone know the mounting bolt size on the Simplex retro friction shift levers with the simple curved/cutout levers? I tried to thread them onto my older Simplex shifter clamp and it is a no go. They appear to be the same diameter but a different pitch...or...??? Tapping the clamp (or another clamp) is no problem but I can't measure the threading. How is the mount bolt removed from the housing...???

TIA
-Mark in St. Louis

I have never used a simplex clamp, but have used the screws that came with a set to fix to regular braze-on bosses. Sounds like that clamp may be weird (or French, I think the two terms may be synonymous).

I can grab another clamp I'm sure...recommendations for a common one?

I believe it's been posted in another thread here, awhile back, that the Simplex retrofriction shifters intended for braze-on mounting are not interchangeable with those produced for band mounting. Grand Bois may have been the source of that, but I'm not certain about it.

+1 My understanding as well. I have the Simplex retrofriction levers and they were mounted directly to the braze ons on a wildly frankened Miyata.

Hmmm...odd...Certainly looks like the square and tube match. I think I can make it work with a tapping. If not, i will machine an entire billet band clamp I guess.

TA
-Mark