Squealing brakes
Replies to This Discussion
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Permalink Reply by Derek Hasel on -
Hi Joseph. I use a Mavic 'pumice' stone to clean the braking surface on my Eurus rims. Seems to work. Also use it on the brake blocks themselves.
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Permalink Reply by heather on -
Derek, I have not heard before of cleaning the brakes. Would you provide more detail?
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Permalink Reply by Terry C on
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Heather, only really necessary if they do squeal. I usually drop the wheel out, roughen the brake pads with course sand paper and use a medium wet and dry on the wheel braking surface. Wipe all surfaces clean before reassembly. A damp rag will do. If squealing persists, it is probably time to change pads.
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Permalink Reply by Simon Lownsborough on -
Sounds like such a first-world problem!
Sorry, just maybe a bit of jealousy there. :-)
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Permalink Reply by Alastair (A-Man) Dowler on -
Add a little bit of toe in so the shoes look like this in brackets > ( / \ ) My swisstops squeal when I brake hard but it generally when some nutcake driver pull out in front of me, the squeal acts as a horn in that case.
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Permalink Reply by Richard Stevens on -
I changed pads ;) but agree with Alastair on their use as a warning device. I too was told to toe them in to assist stopping the squeal and to scrub the breaking surface clear of the yellow build up from the pads.
Also.... I managed to kill a back wheel using them which may or may not have started from a defect within the rim... don't know for sure but word from the wheel builder is that swiss tops have been cooking a few carbon rims of late as they tend to reflect heat back into the rim rather than absorb heat as a lot of other brake pads do....these are his words not mine. He provided me with some different pads after fixing the wheel at no cost...they were not branded. They don't break anywhere near as well as the swiss tops but they are quiet and hopefully will absorb a bit more of the heat that comes from the rims so as not to heat them up.I have some swisstop shimano pads with not too many k's on them that you can have if you like...;) I won't be using them again.
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Permalink Reply by Frank on
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That old chestnut!
Carbon wheels and swisstops can be a few things, perhaps dirty rim or soiled pads but too clean a pads can sqeal too!
Check if pads have toe in as said before, even a slight bit will help but make sure whole pad grips under full load! It does need more regular checking as pad will wear!
The other one is has the pad been overheated, full carbon rims especially Boras do have a great braking surface and brake really well but heat build up is incredible. And seared pads will howl!
Alternatively, let me take the Boras off you and you shall never hear then sqeal again!
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Permalink Reply by Alastair (A-Man) Dowler on
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My rear pads are still cork, they howled when first fitted but now they don't make a sound and work very well.
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Permalink Reply by Charles on -
Happy to have my brakes sqeal, better than a bell. I was watching a doco on the 1962 Tour De France , and boy, did those bikes brakes sqeal decending the mountains.
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Permalink Reply by Don (Who's lost?) Nairn on -
The standard cure is to clean the brake blocks.
Check if they are shiny and sand them lightly until they are dull.
you usually only have to sand the rim unless brake performance is poor.
This is how you do it on low tec. bikes. (alloy rims)
Sounds like your wheels may have cost more than my bike so there may be a different way to work with exotic materials such as carbon fibre.
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