What causes rim brakes to shriek?
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What causes rim brakes to shriek?
Postby Mububban » Sat Oct 20, 2018 11:01 pm
Any ideas what might cause this, and what I could try to fix it? Is it just because it's so new, and it'll bed in shortly? I've tried doing repeated braking efforts but the sound hasn't changed so far.
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Re: What causes rim brakes to shriek?
Postby Thoglette » Sun Oct 21, 2018 12:01 am
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
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Re: What causes rim brakes to shriek?
Postby Tamiya » Sun Oct 21, 2018 12:20 am
If all I had nearest to hand was a spray bottle of Windex... use it to clean the rim & brake pads.
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Re: What causes rim brakes to shriek?
Postby bychosis » Sun Oct 21, 2018 6:40 am
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Re: What causes rim brakes to shriek?
Postby Duck! » Sun Oct 21, 2018 10:10 pm
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Re: What causes rim brakes to shriek?
Postby DavidS » Mon Oct 22, 2018 8:05 pm
DS
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Re: What causes rim brakes to shriek?
Postby AUbicycles » Tue Oct 23, 2018 3:55 am
Again toe-in. The only tools are an Allen Key and patience..
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Re: What causes rim brakes to shriek?
Postby Neddysmith » Tue Oct 23, 2018 8:58 am
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Re: What causes rim brakes to shriek?
Postby Trevtassie » Tue Oct 23, 2018 10:08 am
Loose the nuts, squeeze the brakes, tighten the nuts then take off the zip ties. That way you can be scientific with controlled gaps, still squealing, use a thicker zip tie.
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Re: What causes rim brakes to shriek?
Postby RobertL » Tue Oct 23, 2018 10:14 am
I use a folded up piece of card - whatever I have lying around that's about the right thickness. Same principle, though.Trevtassie wrote:My secret for setting toe in is to use a loose zip tie of appropriate thickness around the end of the pad. With post mounts I put identical pieces of stiff plastic hose on the posts (between the pad and the locking bolt) so you don't need to be an octopus to adjust them. Post mounts were invented by a moron I think...
Loose the nuts, squeeze the brakes, tighten the nuts then take off the zip ties. That way you can be scientific with controlled gaps, still squealing, use a thicker zip tie.
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Re: What causes rim brakes to shriek?
Postby DavidS » Tue Oct 23, 2018 9:10 pm
Maybe more of a touring bike, Allegro T1.AUbicycles wrote:A roadie with V-brakes? Like an older CX bike?
Again toe-in. The only tools are an Allen Key and patience..
Yeah, have toed in a fair bit, very fiddly on V Brakes.
DS
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Re: What causes rim brakes to shriek?
Postby Mububban » Wed Oct 24, 2018 11:42 pm
Next step will be to try roughing up the pad surface. Failing that, take it into the LBS when I pick up my bike from service on Friday
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Re: What causes rim brakes to shriek?
Postby Neddysmith » Thu Oct 25, 2018 9:08 am
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Re: What causes rim brakes to shriek?
Postby Thoglette » Thu Oct 25, 2018 10:16 am
Some brute force is called for to either bend or reshape the brake armMububban wrote:but the other wants to stay flat
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Re: What causes rim brakes to shriek?
Postby P!N20 » Thu Oct 25, 2018 10:32 am
</sarcasm>
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Re: What causes rim brakes to shriek?
Postby kb » Tue Nov 27, 2018 9:19 am
You misspelled “fixie”P!N20 wrote:Disc brakes are the only sensible solution here.
</sarcasm>
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Re: What causes rim brakes to shriek?
Postby Mububban » Tue Nov 27, 2018 3:46 pm
In fact, the brakes don't squeal at all now, because my wife hasn't ridden it once since we bought it
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Re: What causes rim brakes to shriek?
Postby cyclotaur » Tue Nov 27, 2018 6:13 pm
I ride a CX with noisy cantis (they are 7 years old....) and was considering an 'upgrade' to new mini-Vs to reduce noise and improve braking performance.DavidS wrote:Mine shriek too on a roadie with V brakes and I have the pads toed in. Sometimes it just seems to happen. Pain though.
DS
Hope I'm on the right track...
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Re: What causes rim brakes to shriek?
Postby ValleyForge » Wed Nov 28, 2018 11:03 pm
Look for a pair of pads that have elliptical washers on them - KoolStop were my preference for the MTB I had in the 90s with V-brakes. Bloody good brakes and the pads are easy to set toe in with.cyclotaur wrote:I ride a CX with noisy cantis (they are 7 years old....) and was considering an 'upgrade' to new mini-Vs to reduce noise and improve braking performance.DavidS wrote:Mine shriek too on a roadie with V brakes and I have the pads toed in. Sometimes it just seems to happen. Pain though.
DS
Hope I'm on the right track...
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Re: What causes rim brakes to shriek?
Postby Thoglette » Thu Nov 29, 2018 10:14 am
+1ValleyForge wrote:Look for a pair of pads that have elliptical washers on them - KoolStop were my preference for the MTB I had in the 90s with V-brakes. Bloody good brakes and the pads are easy to set toe in with.
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Re: What causes rim brakes to shriek?
Postby cyclotaur » Thu Nov 29, 2018 2:44 pm
Er…..elliptical washers. Right.Thoglette wrote:+1ValleyForge wrote:Look for a pair of pads that have elliptical washers on them - KoolStop were my preference for the MTB I had in the 90s with V-brakes. Bloody good brakes and the pads are easy to set toe in with.
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Re: What causes rim brakes to shriek?
Postby ironhanglider » Thu Nov 29, 2018 9:49 pm
I suspect that he was referring to the concave/convex combinations which allow the pad to be fixed an an angle rather than at only perpendicular to the brake arm. There are many variations on the theme for all styles of rim brakes.cyclotaur wrote:Er…..elliptical washers. Right.Thoglette wrote:+1ValleyForge wrote:Look for a pair of pads that have elliptical washers on them - KoolStop were my preference for the MTB I had in the 90s with V-brakes. Bloody good brakes and the pads are easy to set toe in with.
Cheers,
Cameron
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Re: What causes rim brakes to shriek?
Postby ValleyForge » Fri Nov 30, 2018 10:35 am
Apologies if it's not a commonly used term. Try these - you can see the nature of the washers. http://www.koolstop.com/images/CXT.jpgironhanglider wrote:I suspect that he was referring to the concave/convex combinations which allow the pad to be fixed an an angle rather than at only perpendicular to the brake arm. There are many variations on the theme for all styles of rim brakes.cyclotaur wrote:Er…..elliptical washers. Right.Thoglette wrote: +1
Cheers,
Cameron
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Re: What causes rim brakes to shriek?
Postby Bunged Knee » Fri Nov 30, 2018 11:40 am
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Re: What causes rim brakes to shriek?
Postby cyclotaur » Fri Nov 30, 2018 1:57 pm
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