Answer: The mounting post is not tight in your frame or fork so it cannot hold the spring tension. Remove the brake and tighten the post in your frame/fork and maybe use some threadlocker if needed. I just installed a set of these and had the same problem.misterdangerpants said:So, I just installed some Avid Shorty Ultimate cantilever brakes and have an installation related question. Everything went on without any problems, but when I go to tighten the bolt down while I turn (tension) the spring cap, it just tightens everything. Any suggestions on what I'm doing wrong? These are a different design from the old school design I'm used to so any help would be appreciated!