Squealing Front Brakes
- Thread starter pw2389
- Start date
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mickle
innit
- Location
- 53.933606, -1.076131
Brake squeeeeeeeeel is a sonic reverberation caused by the leading edge of your pads gripping the rim (or disc) and releasing very many times a second. Assuming your braking surface is free of contaminants such as tar or general mank it's a simple case of adjusting your pads so that the trailing (or front) edge of the brake pad hits the rim first. Its called 'toe-in'. The best way to visualise it is to imagine that your rim is a fluid passing through a funnel. The pads are the sides of the funnel. A gap of 1mm to 3mm should shut the feckers up depending on the amount of flex or bearing play in your calipers or cantis.
Dave5N
Über Member
- Location
- Outside The Little Nibble
Put a thick rubber band round the blocks at the back when you set them. When they are tight, take it off.
I have a fancy gadget but a rubber band works fine.
I have a fancy gadget but a rubber band works fine.
mickle
innit
- Location
- 53.933606, -1.076131
A fancy gadget eh?
Dave5N
Über Member
- Location
- Outside The Little Nibble
Don't lower the tone. This is a nice neighbourhood and I wouldn't want to upset my newfound friends by encouraging lewdness and innuendo.
spandex
I love Dr D
So back to lowering the tone
whats the fancy gadget you have?
whats the fancy gadget you have?
Dave5N
Über Member
- Location
- Outside The Little Nibble
It's basically two bits of plastic, joined with a hinge. At each end is a 1.5mm plate set perpendicular to the arms. These go under the pads at the back when you set them.
Smokin Joe
Squire
- Location
- Bare headed cyclist, Smoker
I disagree about squealing being caused by not having the blocks toed in. If the rear of the blocks hit the rim first it will cause the breaks to judder, but squealing is caused either by new blocks needing to have the surface scrubbed in or dirty rims.
mickle
innit
- Location
- 53.933606, -1.076131
Smokin Joe said:
Squealing is judder, the higher the tone the faster the judder.
Perhaps you could tell me why my well bedded in blocks squeal on perfectly clean ceramic rims.
Dave5N
Über Member
- Location
- Outside The Little Nibble
Fact is, if your brakes squeal, toeing in (caveat -always for me) cures it.
Harder with cantis. But the're rubbish anyway. I have seen (I haven't really) oil tankers stop in a shorter distance than my 'cross bike.
Harder with cantis. But the're rubbish anyway. I have seen (I haven't really) oil tankers stop in a shorter distance than my 'cross bike.
Smokin Joe
Squire
- Location
- Bare headed cyclist, Smoker
Don't know.mickle said:
mickle
innit
- Location
- 53.933606, -1.076131
Dave5N said:
Lower the straddle hanger on the brake cable, it increases the leverage.
Dave5N
Über Member
- Location
- Outside The Little Nibble
I know. They are still rubbish.
piedwagtail91
Guest
After reading this i'm begining to think that i must be the only one in the country who sets blocks parallel to the rim with no squeal.
in 30 years i've never toed in brake blocks.
to set i leave the shoes/blocks slightly loose on both sides of the rim, then pull the brake lever tight and set the blocks for height and tighten up the bolt, leaving them parallel to the rim.
i do clean the rims and run a cloth between the rim and block to clean it after every ride.
in 30 years i've never toed in brake blocks.
to set i leave the shoes/blocks slightly loose on both sides of the rim, then pull the brake lever tight and set the blocks for height and tighten up the bolt, leaving them parallel to the rim.
i do clean the rims and run a cloth between the rim and block to clean it after every ride.
spandex
I love Dr D
piedwagtail91 said:
Before you clean your bike get a sheet of paper and put it on the rim. Now pull your brake just so it touches the paper and then have a look at the mark and then tell us your brakes are not toed in!
