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Old 07-22-09, 09:20 PM   #1
billyymc
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Sqealing Brakes - tried all the usual stuff

Riding a 2007 Tricross Comp with Avid Shorty 4 brakes.

Rear brake is fine - quiet.

Front squeals like a pig. Have put on some Kool Stop multi MTB pads (multi-compound), cleaned the wheel, sanded the rim slightly,cleaned again, toed in the pads. Still squeals like hell, and has a bit of a shudder now too -- I'm thinking maybe I toed them in too much? Would that cause the shudder/stutter?

Any other suggestions? Thanks.

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Old 07-22-09, 09:44 PM   #2
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You can always try a brake booster.

If the cause of your canti squeal is a slightly-too-flexy fork, then this could solve it.

The "shudder" part leads me to believe this could be it.
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Old 07-22-09, 10:17 PM   #3
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I've had pads do this before. I just rode them like that one day. They shut up by themselves.
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Old 07-22-09, 10:49 PM   #4
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I doubt you toed them in too much. You may not have toed them in enough.
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Old 07-22-09, 11:27 PM   #5
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Those koolstops maybe your problem. Try $5 generics.
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Old 07-23-09, 03:40 AM   #6
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Those koolstops maybe your problem. Try $5 generics.
Seriously? Seems like I've seen the KS's recommended to help brake squeal problems...why the generics?
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Old 07-23-09, 03:54 AM   #7
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You can always try a brake booster.

If the cause of your canti squeal is a slightly-too-flexy fork, then this could solve it.

The "shudder" part leads me to believe this could be it.
Brake boosters have silenced my loud squealing V brakes with Koolstop pads - highly recommended.
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Old 07-23-09, 05:53 AM   #8
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Riding a 2007 Tricross Comp with Avid Shorty 4 brakes.

Rear brake is fine - quiet.

Front squeals like a pig. Have put on some Kool Stop multi MTB pads (multi-compound), cleaned the wheel, sanded the rim slightly,cleaned again, toed in the pads. Still squeals like hell, and has a bit of a shudder now too -- I'm thinking maybe I toed them in too much? Would that cause the shudder/stutter?

Any other suggestions? Thanks.
I've been through what you've been through and tried the same fixes - none worked. The only thing that worked for me is a massive amount of toe-in (or toe-out if you prefer) -- about 2 mm at the front. This fixed the squeal at the expense of 'squishy' brake feel and a longer pull for hard braking. I dislike the squishy feel but I hate squeal more. I might try the brake booster suggestion mentioned above.
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Old 07-23-09, 06:06 AM   #9
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I think I'll give a brake booster a try. Any recommendations -- is any one better than another?

bmorey - I probably have about that much toe-in as well, and I thought it might be excessive. I played with different amounts, and nothing seemed to work too well. I put in what I thought was too much, and it worked for the first couple rides, then started squealing louder than ever.

Makes me want disc brakes.
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Old 07-23-09, 07:30 AM   #10
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Toeing in costs less than a brake booster. I'm telling you, it will work. Keep increasing the toe-in until the noise goes away.
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Old 07-23-09, 07:59 AM   #11
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Toeing in costs less than a brake booster. I'm telling you, it will work. Keep increasing the toe-in until the noise goes away.
You're right. Will do this first.
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Old 07-23-09, 11:04 AM   #12
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Well, a brake booster costs about $6 (one for the front brake only). The pads can be left parallel to the rim - no toe in necessary. To me when the pads are parallel to the rim, the braking action feels more powerful compared to toed in pads. So if toed in pads feel squishy try a brake booster.
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Old 07-23-09, 11:30 AM   #13
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I had the same problem on my 'cross bike with carbon fork. Seemed that no matter what I tried the front brakes would squeal and shudder like crazy. Toeing the pads to an extreme is NOT recommended as you will find that you will lose alot of braking power. After trying many different pads I think I've finally found the answer ... Kool Stop Tectonic pads. These are very highly rated and after putting them on my bike with no toe-in there is no squealing and the brakes are rock solid. You can get the pads at Cambria Bike for less than $10/pr ... http://www.cambriabike.com/shopexd.a...RIM+BRKAE+PADS
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Old 07-23-09, 12:06 PM   #14
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Shorty's have been known to squeal like crazy and I couldn't ever get them to stop. You can switch out to something like the Tektro 720 for $25 (use you KS pads) and you will get excellent power and modulation with no squeal or shutter. I'm currently running these on my Cannondale CX9 with the EC90X carbon fork with great luck.
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Old 07-23-09, 02:52 PM   #15
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Operator has it almost right. The Loud Stops ARE the problem. bk
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Old 07-23-09, 03:18 PM   #16
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Operator is right - you don't know how to adjust brake-pads.
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Old 07-24-09, 07:37 AM   #17
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Humidity would mimic the effects of riding in the rain. Wet-rim squeal is a common phenomena. Perhaps a softer pad, or a harder one for this? I'd experiment.
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Old 07-27-09, 03:37 AM   #18
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Brake boosters -- is there another name for this item? I can't find them here in Australia. May be they'are called something else here. I'd like to try one on the front of my bike.
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Old 07-27-09, 03:44 AM   #19
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Try this place: http://abbotsfordcycles.com.au/public/index.php

They are the best bike shop in Melbourne for odds and ends that "mainstream" bike shops would not stock!
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Old 07-27-09, 05:34 AM   #20
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Makes sure the brake bushings aren't shot too. front/back play can cause the same problems. See if the brake arms seem loose?,,,BD
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Old 07-27-09, 05:37 AM   #21
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Try this place: http://abbotsfordcycles.com.au/public/index.php

They are the best bike shop in Melbourne for odds and ends that "mainstream" bike shops would not stock!
Thanks for the tip -- but no luck. Lots of nice things, though.
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Old 07-29-09, 09:22 AM   #22
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OK...i'm going to make a confession here, as embarassing as it might be -- had the brakes reversed toed!

Why?

Because I mis-interpreted the toe as being the part of the pad that would be pointing facing into the the spinning wheel. Momma always said....

So, toed slightly and correctly, using Kool Stops -- no squeal, good braking power.

Toe = front. DOH!
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Old 07-29-09, 10:06 AM   #23
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OK...i'm going to make a confession here, as embarassing as it might be -- had the brakes reversed toed!
Ayup.

That'd do it
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Old 07-29-09, 11:01 AM   #24
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Don't feel bad. We all make mistakes like that, and you're especially excused if you're new to this stuff.

Yeah, healed-in brakes should squeak pretty well!
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Old 07-29-09, 11:49 AM   #25
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I just toed-in the pads on the Dia-Compe brakes that came on my old PUCH 3-spd. I used an adjustable-wrench on the arms. It's nice to get back to the basics once in a while...now where's my hammer....
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