Disk brakes squealing like pigs
My bike got put away wet and then left in a (slightly) damp garage for months as I played with my new bike. Afterwards, the brakes squealed like mad.
I assumed it was because the pads had gone all rusty (they had), so bought new ones. Still squeally.
Any suggestions to fix it?Posted 3 years agojoolsburgerMember
Undo the caliper bolts very slightly, nip them up but not tight so they can float/move a bit and ride for a few hours, then do them up tight. Always works for me, absolutely no idea why. Failing that do thisPosted 3 years agojaaaaaaaaaamMember
joolsburger – Member
Undo the caliper bolts very slightly, nip them up but not tight so they can float/move a bit and ride for a few hours, then do them up tight. Always works for me, absolutely no idea why. Failing that do this
After reading that I’d put money on it being cleaning fluid like muck off making mine squeal, I always give a good squirt into the caliper when I clean the bike. Well, I used to…Posted 3 years agotimmysSubscriber
And DO NOT use methylated spirits, use alcohol.
Methylated spirit is usually 90% ethanol/10% methanol, so is alcohol…
Plus various other potential additives (such as mineral oil) which leave a greasy residue making it totally unsuitable for cleaning brake rotors.Posted 3 years agoJamieMembernealyMember
Brake squeal is caused by vibration which is often due to uneven pad material on the rotors. Sand the rotor surface to remove all existing pad material and then clean with IPA alcohol and a clean rag (not meths) and lightly sand the pads keeping them flat although if they’re contaminated then it’s best just to use new pads. Makes sure the calipers are aligned evenly and straight to the rotors and the all bolts are tight then bed the pads in properly to put an even layer of pad material on the rotors by doing 20ish hard brakings without locking up or coming to a complete stop.
Don’t put any copperslip or grease on the back of the pads as it’s doesn’t stop the noise, can damage the caliper seals and risks contaminating the pads/rotors.Posted 3 years agonumber18Member
I struggled with this, and even posted a similar thread on here but mine was ‘like a herd of elephants’.
In the end I just got some Muc-off disc break cleaner. I spray the pads and rotors after every big ride once the bike is clean / dry (usually the morning before my next ride), or after every 2-3 local rides. They are now pretty much silent.
N.B they’re Avid Elixir 3 brakes.Posted 3 years ago
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