disc brake squeal
jon3619
Posts: 75
Hey,
Ive got a carrera vengeance which is new and ive had it for about 3-4 weeks and the disc brake squeals when lightly breaking and its so annoying! Whats this caused by on a 4 week old bike? Will they put it right on my 6 week check up'
Ive got a carrera vengeance which is new and ive had it for about 3-4 weeks and the disc brake squeals when lightly breaking and its so annoying! Whats this caused by on a 4 week old bike? Will they put it right on my 6 week check up'
0
Comments
-
Could be glazed pads which are generally caused by light braking.2011 Carrera Fury
Earn cashback at CRC, Wiggle, Evans, Rutland, Hargroves, Halfords, and more at Quidco0 -
How is that fixed0
-
I have had issues with squeaky brakes and surprisingly i usually solve it by riding along and jamming on the brakes really hard, almost to the point of doing an endo. Not sure whether the squeak is caused by dirt or whatever on the pad and and the sharp braking 'burns it off' almost but whatever the reason, works for me. Bear in mind that i am talking seriously hard and heavy braking, and literally hanging off the back of the bike, out of the saddle so as to not go over the handlebars. Doing this once or twice usually solves the issue and I don't have a problem again (unless I go through deep puddles)0
-
Brake squeal can be caused by a lot of things, or a combination, sometimes you just have to live with it, it can be caused by glazed pads and as suggested a few good hard stops can sort it.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0
-
Hi
As said squeeling brakes are usually caused by contaminated pads (oil / grease) or by being glazed.
You can try to remove the glazing by heavy braking OR (if you are practical) by taking the pads out (wheel off first & dont operate the brake lever with them out) and rubbing them lightly on a flat sheet of fine glasspaper.
Wiping the disk (rotor) with meths or isopropyle alcohol (not oily white spirit) will also clean the disc / pads.
John0 -
have a read of the topic in the FAQs and see if that helps you ID what the issue may be.jon3619 wrote:Hey,
Ive got a carrera vengeance which is new and ive had it for about 3-4 weeks and the disc brake squeals when lightly breaking and its so annoying! Whats this caused by on a 4 week old bike? Will they put it right on my 6 week check up'
also look at what you have done to your bike before this started."Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
I cycle to work everyday and there is a big hill where I brake slightly to slow down, thats when it seems to squeal....when lightly braking0
-
No no no no no NO squealing has usually (99.99% of the time) got absolutely nothing at all to do with contamination (logic, contamination reduces friction, no friction, no energy to dissipate, so no noise) why oh why does this tosh keep getting wheeled out?johnhighfield wrote:As said squeeling brakes are usually caused by contaminated pads (oil / grease)
And no one had said it until you did, so don't blame the rest of us with an 'as said'!Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0 -
Because people have experience exactly those symptoms - getting contiminant on the disks and then experiencing noise? I had a bottle of coke practically explode over the bikes in my garage. Afterwards both my MTB discs and my commuter pads squeaked. Depends on the contaminant.The Beginner wrote:
No no no no no NO squealing has usually (99.99% of the time) got absolutely nothing at all to do with contamination (logic, contamination reduces friction, no friction, no energy to dissipate, so no noise) why oh why does this tosh keep getting wheeled out?johnhighfield wrote:As said squeeling brakes are usually caused by contaminated pads (oil / grease)
Also getting oil/grease on a small section of the disk could be enough to produce a vibration during braking due to the variation in braking force across the disc/pad. I have experience this also - squealing after I got a couple of spots of bike protector on my front disc.You only need two tools: WD40 and Duck Tape.
If it doesn't move and should, use the WD40.
If it shouldn't move and does, use the tape.0 -
The Beginner wrote:contamination (logic, contamination reduces friction
and as you've already said, its the combination of everything in the entire system that determines whether you get squeals or honks.
friction of pads included...0 -
OIl/grease (as originally stated) won't do it, it spreads so it won't cause a vibration, coke may well do it (full fat) as it's sticky as heck (many a clutch fixed short term by spraying coke in it!).
Oil/grease keeps getting wheeled out and it just won't do that, the noise comes froma resonance, something hitting it's resonant frequancy due tio excitation.Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.0 -
Some squeal, some don't :roll:
My Hayes and Shimano don't
My old Hopes squeal like a pig :roll:
Could be it is just your light breaking allowing/making the pads rattle in the calliper due to being slack, some pads are a tighter fit in the caliper than others :idea: Could be the pads are glazed as some have already mentioned if they have not been bedded in properly :idea: Sintered pads with a high metal content are prone to squealing0 -
The Beginner wrote:the noise comes froma resonance, something hitting it's resonant frequancy due tio excitation.
slight contamination on pads = more force required for equal braking = more pressure on pads = system resonance changes?
or maybe my mechanics/physics has got a bit rusty, it has been a long time since college?0
