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Screeching brakes - Koolstop "4 dot" on Weinmann Vainqueur 999 and Mavic clincher MA2

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Screeching brakes - Koolstop "4 dot" on Weinmann Vainqueur 999 and Mavic clincher MA2

Old 11-27-23, 10:38 AM
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Screeching brakes - Koolstop "4 dot" on Weinmann Vainqueur 999 and Mavic clincher MA2

Screeching brakes - Koolstop "4 dot" on Weinmann Vainqueur 999 and Mavic clincher MA2

Despite multiple attempts at toe in, I simply cannot get these brakes to stop screeching really loud.
Any advice sought and welcome!
Thanks,
Scott


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Old 11-27-23, 10:46 AM
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You canít toe those in can you? Those type of brake pads have a flat mount.

Assume youíve cleaned the braking surface thoroughly?
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Old 11-27-23, 11:04 AM
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Originally Posted by choddo
You canít toe those in can you? Those type of brake pads have a flat mount.

Assume youíve cleaned the braking surface thoroughly?
You toe them in by literally twisting the brake with a wrench. Beyond that, be sure the bolts are tight so that the brake itself is not vibrating, scuff the braking surface of the rim with a Scotch-Brite pad, and roughen the brake pad surface with sandpaper.
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Old 11-27-23, 11:56 AM
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I have them toed in properly, I will scotch brite the rims but they look pretty clean............
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Old 11-27-23, 12:15 PM
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Smear garden dirt on the pads. Andy
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Old 11-27-23, 02:47 PM
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Yep, that did it! Thank you sir!
Scott
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Old 11-27-23, 02:48 PM
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Originally Posted by KerryIrons
You toe them in by literally twisting the brake with a wrench. Beyond that, be sure the bolts are tight so that the brake itself is not vibrating, scuff the braking surface of the rim with a Scotch-Brite pad, and roughen the brake pad surface with sandpaper.
Yep, that did it, thank you much!
Scott
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Old 11-27-23, 08:59 PM
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Originally Posted by choddo
You canít toe those in can you? Those type of brake pads have a flat mount.

Assume youíve cleaned the braking surface thoroughly?
They made a tool for that back in the day. Park BT-3.

​​​​​​https://bmxmuseum.com/reference/136
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Old 11-27-23, 09:03 PM
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Yep, crescent wrench works too!
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Old 11-27-23, 09:17 PM
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Originally Posted by strichzwei
Yep, that did it, thank you much!
Scott
I'm glad you got your problem solved. But that reminds me of a ride recently where I took a fresh build with Kool Stops out for a test ride to a pond about a mile from my house. When I made a slight decent towards the pond to take a picture of the bike, the brakes let out an angry honking noise that set the geese to making a such racket I assumed my bike was making a mating call.

I got all the noise out of the front brake, but the rear still has a little Deliverance style squeal like a pig to it.
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Old 11-27-23, 10:08 PM
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A word of warning about twist bending caliper arms to attain pad toe in. Some Al armed calipers didn't like being bent even once and would fracture on trying. Barelli and Universal brands come to mind.

If in doubt just grind/rile the pad contact surface for toe in. Andy
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Old 11-28-23, 07:31 PM
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Originally Posted by Chuck M
I got all the noise out of the front, but the rear still has a Deliverance style squeal to it.
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Old 11-29-23, 09:12 AM
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I would not toe the brake arms that are cast, they may look fine but it could lead to catastrophic end.
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