Bicycle Mechanics - Screaming Shorty 4s: part 2
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A little while ago I posted a thread asking for advice about the shrieking front brake on my Avid Shorty 4 cantilevers. The solution I went with was to buy a set of the Dual compound Kool-Stops.
So, the two follow up solutions I'm pondering are as follows, and I'd like to hear some opinions.
1) The arms don't "seat" fully against the base of the posts. There's almost 1mm of gap there. In other words, the posts are just a hair longer than the mount hole on the arm is deep. If I shim that gap with a washer of some kind, would that make the assembly rigid enough to stop the high frequency vibration?
2) Get a different cantilever. Any ideas? Looking at giving the Shimano R550 cantilever a try.
03-26-07, 04:28 PM
i'm assuming you've tried toe-ing in the brake pad? try reverse-toeing, sometimes that will eliminate it. i have shorty 4s on my touring bike, and will probably transfer them over to my 'cross bike when i get it, i have just learned to deal with the shriek and enjoy the ride.
Thanks OneTinSloth...I have tried toeing them in.
Of course, with the "thinline" Kool-Stops I have Sheldon Brown said that the wedge on the aft portion and the front portion should contact simultaneously. This creates a bit of "auto toe-in" if done as designed.
03-26-07, 04:59 PM
Shorty 4's are kind of notorious for squeeling. Something folks overlook is cleaning their rims. Road grime and make your brakes squeel. If they're clean, you may want to try different brakes. I've heard good things about the Shimano's not mentioned. I just got a pair of Tektro Oryx (the new style with the pad holders and replaceable inserts) and must say I'm very impressed. Incredible quality for the price.
Would you recommend the Shimano R550 or the Tektro Oryx more? I had looked at the Oryx, but I was thinking that the R550 might be the better "gamble".
03-26-07, 06:09 PM
There was another user here that recommended "mini-v" linear pull brakes as a permanent solution to squeal. Apparently he worked in a shop and installed many sets of mini-vs and all were successes.
Mini-vs have 80-85mm long arms instead of 95mm (for regular linear-pull brakes).
Tektro makes a set.
I don't believe "mini-v" brakes will work with a short pull lever...in this case, brifter. Please correct me if I'm wrong though.
I did look at the Tektro mini-v, but I think they're long pull. I'll check again though.
Tektro's website is not a wealth of technical info. I'm still searching though...
03-26-07, 07:01 PM
For me it came down to cost and quality. The cheapest I could find the Shimanos were $65 shipped for a set. I bought the Tektros off ebay for $33 shipped. Even with the price difference I was still leaning toward the Shimanos until I saw a pair of Tektro's on my buddy's bike. I was impressed with how solid they were.
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