Through the generosity of a fellow CR member (Is this a great list or what?), I now have adjustors installed in the Huret dropouts of my 1974 Raleigh Super Tourer.
I believe these are Huret adjustors, although I can't find any Huret markings. The screws seem about the same diameter as Campy adjustors, but do not thread into the Huret dropouts. Instead they thread into a crescent shaped piece of plastic that fits fairly snugly into the back end of the dropout slot. The dropouts are either unthreaded or a larger thread than Campy and do not themselves engage the adjustor thread.
Can anyone confirm that these are in fact Huret adjustors? Did Huret ever make another type adjustor that threaded into the DO? If not, are the holes in the Huret DO's not threaded then? Also, did the adjustors I have originally have little caps screwed onto the rear-facing ends like Campy adjustors? Finally, since these do not thread into the DO, there seems to be nothing to prevent the screw and plastic collar from moving forward in the DO when the wheel is removed. Was the plastic collar held in place at the back of the DO only by the wheel axle?
This matter with the Huret adjustors has caused me to notice something that I had overlooked for years, namely Simplex DO's with threaded adjustors. The Simplex DO's on late 60's/early 70's PX-10s are unthreaded and use Simplex adjustors which clamp the DO from either side. I had assumed all Simplex DO's of the era were like this. But now that I look again at the Simplex DO's on my 1972 Follis mod 172, which I think I've had 7 or 8 years, they are in fact drilled and threaded and use adjustors that look very similar to Campy adjustors. Anyone else have Simplex DO's like this? Were thay relatively rare? What bikes other than Follis used them? Is the adjustor thread the same as Campy?
Regards,
Jerry Moos
Big Spring, TX