Noisy Brakes

Peter Signorini <[email hidden]> wrote in message
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"Theo Bekkers" <[email hidden]> wrote in message
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"Deep Freud Moors" wrote

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slightly (angle them so that the tailing edge of the pad hits the

rim

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first), and that will stop the squealing.

I suggest you try some toe-in on the pads. Toe-in is angling the pads
so that the leading edge (the toe) contacts first, not the heel.

Err, some crossed wires here I think. It all depends on your orientation

re.

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the bike and what is 'leading'. I read DFM as talking about the trailing
edge in relation to direction of wheel spin.

Yep...

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Correct toe-in, not nearly so
critical with the long pads of V-brakes, has the trailing edge (ie. part

of

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brake shoe closest to the front of your bike) contacting your rim maybe

1mm

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earlier.

The main reason for this has to do with flex in the brake calipers under
load. As they flex the pad will come around to parallel with the rim. If

you

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begin with parallel pads the flex of the caliper will cause them to

toe-out,

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which is where a whole lot of harmonics are set up, causing that shriek.

The issue I have is that they end up wearing parrallel after a few
days/weeks. Then they start squeaking again. With the rear pads I just flip
them over when they wear unevenly, but I can't do that with the front ones.
Oh well, I will try another set of pads I guess, and maybe sand the braking
surface a little. Maybe just not use them as much...
---
DFM

Hi all

Yes noisy brakes. My front ones, on my MB cantilever style, make about
as much noise as an 18 wheeler Mack truck when pulling up hard. At 5am
in the morn not winning many freinds in 'hood, as well as looking
extremely uncool to all the local cats and dogs around at that time.
Anybody have a remedy for the noise? besides just using the rear...

Thanx in advance.
DavMen

"DavMen" <[email hidden]> wrote in message
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Hi all

Yes noisy brakes. My front ones, on my MB cantilever style, make about
as much noise as an 18 wheeler Mack truck when pulling up hard. At 5am
in the morn not winning many freinds in 'hood, as well as looking
extremely uncool to all the local cats and dogs around at that time.
Anybody have a remedy for the noise? besides just using the rear...

Make sure the rims and pads are free of oil and grime - if this isn't the
problem, possibly look at new pads?

Tim

"DavMen" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Yes noisy brakes. My front ones, on my MB cantilever style, make about
as much noise as an 18 wheeler Mack truck when pulling up hard. At 5am
in the morn not winning many freinds in 'hood, as well as looking
extremely uncool to all the local cats and dogs around at that time.
Anybody have a remedy for the noise? besides just using the rear...

I have exactly the same "problem". I think it is due to the
combo of dirty rims and old, hard brake pads.

I haven't put new pads on yet because the screechy noise
is good for scaring.. err.. warning pedestrians ;-)

Try some new pads and adjust their position, perhaps with
a little more toe-in (I think that's the standard cure).

Otherwise spray your rims with WD40.. quiet as a sleeping pup.

What the hell are you doing riding around at 5am anyway?! :-P

hippy
- No, DON'T spray WD40 on your rims.. that was a joke.

DavMen said:

Hi all

Quoted message said:

Yes noisy brakes. My front ones, on my MB cantilever style, make about
as much noise as an 18 wheeler Mack truck when pulling up hard. At 5am
in the morn not winning many freinds in 'hood, as well as looking
extremely uncool to all the local cats and dogs around at that time.
Anybody have a remedy for the noise? besides just using the rear...

All the tips so far, and try taking your pads out and rubbing them on a
brick wall. Then sand your rims lightly. Adjust the angle the pads hit
(toe-in a little, as everyone says) and make sure they can't vibrate too
easily (change the length of pad stem which is out of the clamp).

--
*--------------------------------------------------------*
| ^Nothing is foolproof to a sufficiently talented fool^ |
| Heath Raftery, HRSoftWorks _\|/_ |
*______________________________________m_('.'😉_m_________*

"DavMen" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Hi all

Yes noisy brakes. My front ones, on my MB cantilever style, make about
as much noise as an 18 wheeler Mack truck when pulling up hard. At 5am
in the morn not winning many freinds in 'hood, as well as looking
extremely uncool to all the local cats and dogs around at that time.
Anybody have a remedy for the noise? besides just using the rear...

A little sandpaper around the rim fixed mine. Not sure that this is a good
long term solution tho..

Don't have any answers or tips, other than check to see if the brakes
haven't wore down to metal and clean built-up crud from rims. From
personal experience, old chrome steel rims are absolutely terrible in
the sort of weather I'm looking at present (3.53pm, Melb.Daylight Saving
Time) Like a vise when dry, like a pair of greased eels when wet. Modern
technology good...alloy rims, better still, disc brakes.

--
life ain't much but there's nothing else to do

life ain't much but there's nothing else to do

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"Bristan" <daed> wrote in message
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A little sandpaper around the rim fixed mine. Not sure that this is a

good

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long term solution tho..

I use that green "scotch brite" scourer stuff from
the kitchen for less rim wear and similar cleaning
effect.

hippy

"Deep Freud Moors" wrote

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OK, first of all let me just say I AM SICK TO FRIGGIN DEATH OF MY

SQUEAKY

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FRIGGIN BRAKES.

Now that I have that out of the way, the idea is to "toe-in" the

brake pads

Quoted message said:

slightly (angle them so that the tailing edge of the pad hits the

rim

Quoted message said:

first), and that will stop the squealing.

I suggest you try some toe-in on the pads. Toe-in is angling the pads
so that the leading edge (the toe) contacts first, not the heel.

Has worked for me for forty years.

Cheers

Theo

When you say "toe-in" is achieved by angling the leading edge of the pads
towards the rim, do you mean leading as in the end towards the front of the
bike, or leading as in the end that the rim passes through first (ie towards
the back of the bike)??

Also, wouldn't achieving toe-in eventually wear your brake pads down at an
angle so that to achieve toe-in again, you would have to angle them
further....etc,etc??

Finally, I have actually tried adjusting my brakes to toe-in with the end of
the pads at the front of the bike being the toes, and I found that although
my squeaky brakes were now fixed, I seemed to lose a fair deal of "feel" in
the lever. It sorta felt like it was either on or off and provided less
modulation (think thats what they call it) for situations requiring anything
less than full braking power.

Anyone help me on this??

Gags

"Theo Bekkers" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Deep Freud Moors" wrote

Quoted message said:

slightly (angle them so that the tailing edge of the pad hits the

rim

Quoted message said:

first), and that will stop the squealing.

I suggest you try some toe-in on the pads. Toe-in is angling the pads
so that the leading edge (the toe) contacts first, not the heel.

Err, some crossed wires here I think. It all depends on your orientation re.
the bike and what is 'leading'. I read DFM as talking about the trailing
edge in relation to direction of wheel spin. Correct toe-in, not nearly so
critical with the long pads of V-brakes, has the trailing edge (ie. part of
brake shoe closest to the front of your bike) contacting your rim maybe 1mm
earlier.

The main reason for this has to do with flex in the brake calipers under
load. As they flex the pad will come around to parallel with the rim. If you
begin with parallel pads the flex of the caliper will cause them to toe-out,
which is where a whole lot of harmonics are set up, causing that shriek.

Cheers
Peter

"Gags" <drgagnon@nospam_ozemail.com.au> wrote in message
news:[email hidden]...

Quoted message said:

When you say "toe-in" is achieved by angling the leading edge of the pads
towards the rim, do you mean leading as in the end towards the front of

the

Quoted message said:

bike, or leading as in the end that the rim passes through first (ie

towards

Quoted message said:

the back of the bike)??

Leading in relation to the front of bike, or rather trailing re rim motion

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Also, wouldn't achieving toe-in eventually wear your brake pads down at an
angle so that to achieve toe-in again, you would have to angle them
further....etc,etc??

It shouldn't be a problem. Don't toe-in to much - 1mm. Flex of the brake
mech should leave your pads flat faced under load.

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Finally, I have actually tried adjusting my brakes to toe-in with the end

of

Quoted message said:

the pads at the front of the bike being the toes,

Correct

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and I found that although
my squeaky brakes were now fixed, I seemed to lose a fair deal of "feel"

in

Quoted message said:

the lever. It sorta felt like it was either on or off and provided less
modulation (think thats what they call it) for situations requiring

anything

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less than full braking power.

Not sure about this. Maybe by getting your pads flat faced on your rim you
are getting more stopping power?

Cheers
Peter

Peter Signorini:

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"Gags" <drgagnon@nospam_ozemail.com.au> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

Also, wouldn't achieving toe-in eventually wear your brake pads down at an
angle so that to achieve toe-in again, you would have to angle them
further....etc,etc??

It shouldn't be a problem. Don't toe-in to much - 1mm. Flex of the brake
mech should leave your pads flat faced under load.

The pads still wear out unevenly, the trailing edge of the pad more so
than the leading edge by sole virtue of it coming into contact with the
rim first. There will eventually be a need to re-adjust the pads for
appropriate toe-in, but at that stage the squealing might likely have
gone away due to erosion of the rim/pads.

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and I found that although
my squeaky brakes were now fixed, I seemed to lose a fair deal of "feel"
in the lever. It sorta felt like it was either on or off and provided less
modulation (think thats what they call it) for situations requiring
anything less than full braking power.

Not sure about this. Maybe by getting your pads flat faced on your rim you
are getting more stopping power?

The situation being experienced is due to the toed-in brake pads now
having to either rotate slightly at the caliper arms, or the pads
bending along their lengths, as they are pressed against the rim. The
latter is most observable on thin V-brake pads such as Koolstop mountain
pads; with the built-in plow tip at the leading edge, it makes for an
uneven pad surface to start with, and repeated loading against the rim
can bend the whole pad such that the contact area with the rim involves
the plow tip and the trailing half of the pad only.

Heh, i've had my bike for less than a month, and already the rims are
noticably thinner where the brake pads hit them 🙁

hippy said:

"Bristan" <daed> wrote in message
news:[email hidden]...

Quoted message said:

A little sandpaper around the rim fixed mine. Not sure that this is a

good

Quoted message said:

long term solution tho..

I use that green "scotch brite" scourer stuff from
the kitchen for less rim wear and similar cleaning
effect.

hippy

Hi All

The secret must be in clean Rims:

All noise ceased after some heavy continuous braking during the Gong ride.

Thanx, will keep all your tips in mind should prob arise again.

Dav Men