Let the lube settle in and wipe off any excess lube. I suffered from terrible front brake squeal when wet. I'd tried cleaning the rotors and pads, I'd tried different organic and sintered pads, none of it made any difference. But finally I have solved it - by changing the rotor. The original rotor was the Avid one that came with the brake calipers BB7s , which is pretty light and spidery.
Now with the shimano rotor and sintered pads the brake only rarely, and very briefly, squeals. Interestingly the rear brake was identical and never made any noise. I guess that the difference is to do with the frame stiffness and resonant modes being quite different front and back. This is on a Surly Ogre frame, with an eZee hub motor on the front I mention the hub because the motor hub has vastly more inertia than a normal front hub, and this might be a factor in the resonance.
As usual, YMMV. By all reports disc brakes are pretty fickle things and what fixed my problem might make yours worse. Some manufacturers specifically state not to use automotive brake cleaners. They suggest rubbing alcohol. I don't know why, perhaps it might loosen the adhesive bonding the friction material and the backing plate.
With auto brakes it's because of the thin layer of corrosion that's built up on the rotors. No experience with bike disks. The effect of cleaning pads and rotors with alcohol is that alcohol evaporates faster than water but the screeching disappears only after downhill riding and heating up the rotors enough to bed in and dry fully the pads and rotors after cleaning but only until wet and dirty again.
Noisy is better than poor braking, upside is, your riding buddies will know when you are coming up behind them downhill and make way. My brakeset is Tektro Auriga mm front and rear, both of them squeal like a beaten pooch during rainy rides. It is caused by the particles of the pads trying to grip the rotors but because of the wet condition, some of the particles are unable to grip the rotors.
Pretty much the same when you rub your wet finger on a stainless steel. It makes a "crieeek" sound and you can feel your finger like rubbing a rugged surface. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Originally Posted by deadmn My breaks only would make noise when it's a little wet and gone after 2 stops. Maybe my rotor is dusty? Will the dealer clean the dust for me? Is it part of the warranty? So this only happens for like 15 seconds after some rain?
What is the problem then? Originally Posted by mike-y. There is really nothing else the dealer can do. Originally Posted by CombatNinja. Go get some better quality rotors that won't rust up after a splash of water if its that big of a pain otherwise this is completely normal.
It's normal for a rotor to rust if it gets wet. Just drive the car for a few minutes and it will rub right off. What you can do if to avoid the rust is spray the entire with a black high temp spray that you can get from a local auto parts store.
Once you spray the entire rotor black, whatever the pad comes in contact with the rotor, that part will rub right off and the rest will stay black. Find More Posts by r1concepts. Higher quality pads are not only made of better quality materials but have usually undergone more extensive research, additional testing and more stringent control procedures. However, all of this means that high-quality brake discs and pads are often more expensive.
In certain situations, the additional cost of high-quality brake pads and discs really makes a difference. For example, high-end sports cars tend to need higher quality brakes which can withstand greater braking forces. However, for the average driver, there is likely to be a limit at which high-end brake discs and pads become unnecessary.
Therefore, for daily driving, we would say the best practice is to replace your brake pads and discs with manufacturer-approved parts. Not only will this help ensure you get the best performance from your brakes, but it will also help reduce the chances of your brakes squeaking.
Moisture : When moisture collects on the brake rotors from overnight rain, dew or condensation it causes a thin layer of rust to form on the rotor surface. As the rotor turns the pads scrape the rust off the rotors. This rust can then get caught on the leading edge of the brake pads eventually embedding into the leading edge causing a squeak. Squeaky brakes caused by moisture often occur in the morning and usually stop after a few minutes when the brake pads have had a chance to warm up a little or the thin layer of rust has worn off.
Thinning Pads : As mentioned most brake pads are fitted with a wear indicator which will start producing a squealing sound when your brake pads are getting thin enough to require changing.
The result of this is larger pieces of metal on the brake pad surface. These metal pieces drag on the brake rotor and can cause high pitched squeaky brakes. The only real fix to this would be to always buy the best quality brakes pads recommended for your car. Glazing : Brake pads can become glazed resulting in them producing a squeaky noise. If brake callipers stick it can cause the brake to stay partially applied.
This results in excessive friction and heat which can cause the brake pads to harden and crystallise or glaze. Glazed brakes reduce the stopping action of your brakes as well as causing a high pitch sound when you apply the brake. New Brakes Squeaking: As discussed above, it is not uncommon for new brakes to squeak intitally as they bed in. This can be down to the materials used in the brake pads and if this is the case the squeaking usually wears off quickly. New brakes squeaking can also be caused by metal fibres in brake pads which if too close together can generate squealing sounds.
This moisture causes a layer of rust to develop on the rotor. As you drive and use your brakes, the surface rust will get scrubbed off. The best way to avoid this is to park your car overnight in a garage or other dry environment when possible.
In many vehicles, the ABS system makes grinding or buzzing noises when you step on the brake pedal. Don't be alarmed, it is normal for the ABS system to make grinding or buzzing noises. If you are still experiencing brake noises, it is time to have your trusted mechanic take a look at your vehicle. Learn more about quality brake parts , find your car part , or find where to buy your auto part today.
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