I finished restoring a 1971 Mercian (possibly a King of Mercia) a few months ago and have been having a big problem with my Weinmann centerpull brakes squealing very badly.
They were new old stock Weinmanns and I replaced the original pads with new Yokozuna brake pads which are made with the original salmon-colored Scott-Mathauser brake compound (you can find them here: http://www.yokozunausa.com/brakeshoes.html).
The rims were new old stock Super Champion Mod. 58s.
I know about toe-in, but I just dont feel comfortable bending these caliper arms. The reason I tracked down a new old stock set of Weinmanns is that one of the arms on a used set I had cracked while trying to toe them in.
Is it just that the pads and rims need to be "worked in"? I have heard of using sandpaper to rough up the rim surface - is this advisable? If so, what kind of sandpaper?
Braking power is not an issue - the bike stops on a dime and modulation is good. The squeeking is just annoying.
Any help would be much appreciated!
Ok, here is your reward for reading all that: