Anyone have replaced cantilever brakes on old steel bikes with modern ones?
I had a pair of Altus BR-CT91 and thought it will just fit nicely and went ahead disassembled the old ones to find out that doesn't fit

The boss that holds it to fork / seat stay is too close to the rim, so I have installed back the older one for now

I am looking at the BR-CX50 and found there are 3 different size of washers but still seems too long for my Centurion ProTour15.
I am running 700c while originally it is for 27" rims, and have wider rims at 25mm.
Since the frame of BR-CX50 is like a caliper where the pads are attached - kind of - does someone actually try to attach the caliper pads directly to the BR-CX50?
It seems will work, but if someone actually did it will be great to know