Originally Posted by
unterhausen
The bosses that most builders use come with a spring stop. The Rene Herse bosses have a stop that can be placed at any angle. I have also used canti bosses turned 90 degrees. I think RH used to carry the Diacompe bosses that have the flat for their stop
A cursory search didn't reveal anyone stocking those Dia Compe kits, I have some Mafacs that could use new springs.
I think it would be interesting to have a list of canti post spacing dimensions on working systems. My vague recollection is that the 85mm spacing that builders use nowadays comes from a specific Shimano brake. Before that, spacing was all over the place.
Cycles Toussaint stocks the kit:
https://www.cyclestoussaint.com/prod...n-assembly-kit
Also, Merry Sales should be able to order pretty much anything Dia Compe.
I'll add a column in the canti section for "recommended boss spacing." There's a MAFAC spec sheet with that spec for all the MAFAC cantilevers so it's at least worth having for those data points, if not others. I know a lot of people in C&V also have trouble with intermixing modern cantis with narrower-spaced frames from the 80s, so might help there.