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Avid Shorty Six squeal!!!(13 posts)

Avid Shorty Six squeal!!!chrisjohn02
May 14, 2002 10:35 AM
No matter what I do, can't seem to get my front brakes to quit screaming on my Bianchi Axis. Tried the usual toeing procedures with zero success. Switched from Avid RW pad to a red kool stop pad with no success either. Seems that they brakes themselves have perhaps excessive lateral play, but not really sure about this. Please any ideas?
re: Avid Shorty Six squeal!!! Me Too!atpjunkie
May 14, 2002 11:46 AM
having same problem. changed pads as well to slight improvement. I'm not seeing any play laterally though, just think it's the way it engages.
re: Avid Shorty Six squeal!!! Me Too!peter in NVA
May 14, 2002 5:11 PM
Avid Shory 4's for the last two years on my Ritchey Swiss Cross. Same problem. Hikers are actually getting annoyed!
I tried toe-in/out/flat, green WR ceramic pads as well as blue and red Ritchey help. The Ritchey Cantis (Diacomps) that came with the bike did the same thing.
I've given up, but the Avids sure are nice otherwise...stops right through mud with great modulation, and powerful.
re: Avid Shorty Six squeal!!!Velocipedio
May 14, 2002 7:46 PM
Geez... so it's not just me? That makes me feel better.

I thought I was losing my mind; I've tried adjusting and re-adjusting the toe-in, and I just couldn't get it right.

Is there any solution? I assume it's the pads, so presumably changing the pads would make the difference.

On the other hand, the squealing has been driving me so nuts that I just try not to brake. Sure has helped my descent speeds go up... :)
re: Avid Shorty Six squeal!!!peter in NVA
May 15, 2002 12:02 PM
I don't think its the pads, same ones on the rear don't squeal. My LBS has a theory that the pads don't contact the rims correctly because my narrow fork won't allow them to open up. I notice I have more travel in the rear than front.. but I don't know if that's the cause.
I also hold back on braking...which ruins all the fun and doesn't let me ride the way I want.
I use my bike mostly for trail riding which XC wasn't intended so I think there hasn't been much development in making quiet brakes. I believe most racers don't care since they are concentrating on the race.
I still toy with the idea of disc brakes...but I don't think my thin steel tubing would take the stress if tabs were welded on.
re: Avid Shorty Six squeal!!!Velocipedio
May 15, 2002 3:02 PM
Well, I had some success by REALLY toe-ing the pads in, more than I would normally. There's still some squeak, but it's low-frequency and JUST when the pads first make contact with the rim. I also used the centering screws to increase the spring tension quite a bit on both arms [while being very careful to keep everything centered], and that seems to have worked.

Since the squeak only developed on my bike after about 800 km, I think it may be related to the way the pads wear in the front, given the narrow fork... just a theory.
extreme toe-inKEN2
May 16, 2002 11:48 AM
I agree, I've had success in curing the dreaded squeal by lots of toe-in, so much that only the front 1/3 or so of the pad contacts the rim unless I really reef on it. Eventually you get too much wear and they squeal--then reverse the pads and voila! new part of the brake block and no squeal again.
re: Avid Shorty Six squeal!!!TWD
May 15, 2002 3:53 PM
I've noticed the same problem on my Axis. I ended up swapping out the Avids for a set of Shimano V-brakes (not known for being quiet either). They squealed just about the same, until I put on a brake booster. That seemed to fix most of the problem, so it may be the fork. Not sure about that, but it's a definite possibility.

With the booster on I only get a very faint squeal once in a while when gently dragging the brakes (i.e. coming to a rolling stop waiting for a stoplight to change).

The V's w/travel agent adapter and brake booster have way more power than the Shorty's.

Anybody wanna buy a barely used set of Shorty 6's?......LOL ;-)
Howdja set up the V-brakes?The Walrus
May 15, 2002 5:21 PM
After two unsatisfying encounters with the V-brake/Travel Agent combo, I went back to cantis. The feel at the lever was always mushy, the response was inconsistent and braking power was weak. Didn't seem to matter how much I fiddled with 'em.

One other possible cause for squeal: if the brake posts project beyond the canti arms, this can cause enough play in the arms to aggravate the squealing. I slipped a pair of paper-thin brass shims over the posts, between the arms and the bolt head, and cut the sound effects by about half.
Howdja set up the V-brakes?chrisjohn02
May 16, 2002 10:23 AM
Ahh, that sounds like a good fix. I'd thought of it, but don't want to retard the brake arm motion. Will give it a try though.

BTW, I've tried three different pads and all of the make the a similar amount of noise
Howdja set up the V-brakes?TWD
May 20, 2002 10:20 AM
Don't think I did anything too special. Set them up according to the directions. They are a little on the mushy side but they seem to have a fair bit more power than the Avid Canti's that came on the bike(several near death experiences on the first wet downhill run!!!), not quite on par with the V's on my SS MTB, and nowhere near the power of the Avid Discs on my geared MTB.

I ran the V's with travel agents on my road tandem before swapping to Magura HS-66s. The combo worked better than canti's there too.

There are (or were) two models of the travel agent out there, one with a barrel adjuster and one without. I got the model with the barrel adjuster which is a must. You have to set the pads really close to the rim to get them to work, and without the adjuster you can't adjust for pad wear.

I typically like a really firm feel at the lever, but I've gotten used to the softer feel. Still better than canti's IMHO for the terrain I ride.
My SolutionSteve_O
May 20, 2002 8:52 AM
I have the Shorty Ti's and had the same problem... I contacted Avid and they told me that it has been a reoccurring problem with the pads. They sent me a different pad compound which solved the problem.

Note - Your descriptions are nearly identical to what I experienced. A little toe in helped but not for long. Definitely contact Avid...
re: Avid Shorty Six squeal!!!h2o_jedi
Sep 6, 2002 9:07 AM
I may have found a solution to our problem! I Mounted a Shimano Carbon V-brake booster to the outside of the brakes and the squeel disapeared!!! I'm not sure if any ole v-brake booster (aluminium) would do this, I'm pretty sure it has to do with the carbon. I don't know if shimano still makes this, but Magura, Salsa, and woodman all make a cabon brake booster Has anyone had this squeel while running a carbon cross fork or a steel cross fork?? My theory is that it is a problem of resonance (remember the Narrows Bridge from you HS physics class). Hope this helps!!