{"id":40333,"date":"2022-08-23T10:00:56","date_gmt":"2022-08-23T08:00:56","guid":{"rendered":"https:\/\/www.bikeradar.com\/?p=694332"},"modified":"2022-08-23T10:14:15","modified_gmt":"2022-08-23T08:14:15","slug":"how-to-silence-disc-brakes-7-ways-to-fix-squealing-disc-brakes","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/cyclingplus\/rss_feed\/how-to-silence-disc-brakes-7-ways-to-fix-squealing-disc-brakes\/","title":{"rendered":"How to silence disc brakes: 7 ways to fix squealing disc brakes"},"content":{"rendered":"

<\/p>

By Oscar Huckle\n \t\t<\/p>

Published: Tuesday, 23 August 2022 at 12:00 am<\/p>

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Disc brakes offer confidence-inspiring and consistent braking, even in wet weather.<\/p>\n

They\u2019re generally very reliable and durable components, but disc brakes<\/a> can make a lot of noise if they\u2019re not set up correctly or contaminated. That noise can sound like a \u2018ting-ting-ting\u2019 as you ride or a squeal as you stop.<\/p>\n

In this guide, we\u2019ll take you through the different reasons why your disc brakes may be noisy and how to silence them.<\/p>\n

Why are my disc brakes noisy?<\/h2>\n
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There are many reasons why a disc brake can be noisy.<\/span><\/figcaption> David Caudery \/ Immediate Media<\/i><\/span><\/div>\n

Disc brake rubbing can occur for a number of reasons. We\u2019ll explain some of the common causes of disc brake noise and provide some suggestions on how to resolve the problem.<\/p>\n

When working with disc brakes, it\u2019s always worth wearing a fresh pair of mechanic\u2019s gloves or using a lint-free rag because the oils in your skin can contaminate the pads and rotor.<\/p>\n

If you have any doubts as to your mechanical ability, take your bike to a reputable mechanic.<\/p>\n

Poor alignment of the brake caliper<\/h3>\n
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You\u2019ll need to loosen the two caliper mounting bolts to reposition it over the rotor.<\/span><\/figcaption> Our Media <\/i><\/span><\/div>\n

One of the most common reasons a disc brake is rubbing is the brake caliper is misaligned with the disc rotor<\/a>.<\/p>\n

It is imperative the caliper is centered properly. If it isn\u2019t, the disc will scrape against either the brake pad or on the inside of the caliper body.<\/p>\n

Admittedly, the tolerances on many disc brake systems have grown very fine and it can sometimes be a tricky task.<\/p>\n

If your frame uses quick-release dropouts, make sure the wheel is installed correctly before making any adjustments to the brake. It is best to install the wheel on the floor rather than on a stand to allow gravity to centre it in place. If your bike uses thru-axles, you don\u2019t need to worry about this step.<\/p>\n

The easiest way to resolve the issue is to slightly loosen the two bolts that hold the caliper to the frame. There\u2019s no need to undo them fully, just enough so the caliper is free to move. These are often 4 or 5mm hex bolts, or sometimes a T25 torx bolt.<\/p>\n

Once you have loosened the bolts, spin the wheel and pull on the respective brake lever. Then, without releasing the brake lever, equally tighten the two bolts back up to the relevant torque<\/a> spec and, fingers crossed, the problem will be solved.<\/p>\n

This process repositions the caliper over the rotor and by holding the brake on, should cause the caliper to self-align.<\/p>\n

It\u2019s important you tighten the caliper to its full torque spec before releasing the lever. If you torque the bolt after releasing the lever, the effect of any final tightening can minutely move the caliper and then you\u2019re back to square one.<\/p>\n

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Careful manipulation of the caliper is your next port of call.<\/span><\/figcaption> Our Media <\/i><\/span><\/div>\n

If this technique hasn\u2019t solved the issue, you can try to align the caliper by eye. If you\u2019re working somewhere with little light, try putting a piece of white paper on the floor behind the caliper. The white paper will make it easier to align the caliper because it will make the space between the pads and rotor more visible.<\/p>\n

If your disc brake still isn\u2019t aligned after trying these steps, some manufacturers such as Birzman or Hayes have caliper-alignment tools in their range. These are essentially feeler gauges with metal either side of the same width, to create an equal space between the disc brake pads.<\/p>\n

You fit caliper-alignment tools over the disc rotor in the loosened caliper. Once installed, pull on the brake lever and tighten the two bolts to the relevant torque spec. As long as the disc rotor isn\u2019t bent, this often solves the problem.<\/p>\n

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Cable tension and brake pad placement are other elements to adjust on a mechanical disc brake system.<\/span><\/figcaption> Oscar Huckle \/ Our Media <\/i><\/span><\/div>\n

If you own mechanical disc brakes, the setup procedure can be a little different. Most systems comprise of one moving disc brake pad and one static pad. You want to set the static pad as close to the disc rotor as possible and then fine tune the cable tension to ensure an optimal lever feel.<\/p>\n

If the mechanical disc brakes are of a dual-piston design, such as the Tektro Spyre, then setup is largely the same as with hydraulic systems, in conjunction with setting the correct cable tension.<\/p>\n

Pads contaminated<\/h3>\n
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Disc brake pads can attract muck and grime.<\/span><\/figcaption> Our Media <\/i><\/span><\/div>\n

Your disc brakes will certainly be noisy if your brake pads are contaminated. Brake pads can be contaminated if you ride through oil on the roads, or if you accidentally get any degreaser or lubricant on them.<\/p>\n

When you\u2019re cleaning your bike<\/a>, make sure you either cover your disc rotor and caliper or spray degreaser on the chain in a way that means it won\u2019t get onto the rotor.<\/p>\n

Providing the wind isn\u2019t blowing in the rotor\u2019s direction, you can spray degreaser<\/a> on the chain just as it meets the crankset underneath the driveside chainstay, because this is the furthest point away from the disc brake system. In terms of cleaning disc brakes, it\u2019s always best to use specific disc brake cleaner or isopropyl alcohol.<\/p>\n

You can alternatively use a chain-cleaning device to virtually eliminate the risk of pad contamination.<\/p>\n

You\u2019ll know if your pads are contaminated because when you come to a stop you\u2019ll hear a squealing noise and the braking power will be reduced considerably.<\/p>\n

The easiest way to resolve the problem is to scrupulously clean the disc rotor and brake caliper, and replace the pads.<\/p>\n

If there is a lot of pad material left, you can burn off the contaminants using a blow torch or sand some material away. However, this doesn\u2019t always work and is almost always more trouble than it\u2019s worth.<\/p>\n

Pad material<\/h3>\n
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Organic and sintered brake pads.<\/span><\/figcaption> Immediate Media<\/i><\/span><\/div>\n

Disc brake pad material<\/a> can have an effect on noise. Organic pads tend to run quieter than metallic pads.<\/p>\n

If you decide to change your disc brakes pads from one material to another, make sure you use a new disc rotor that\u2019s compatible with the pad material to ensure optimum performance.<\/p>\n

It\u2019s important to add that you should use the correct disc brake pad for the overall braking system.<\/p>\n

Disc brakes aren\u2019t bedded in<\/h3>\n
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A proper bed-in process unlocks the brake\u2019s full potential.<\/span><\/figcaption> Russell Burton \/ Our Media<\/i><\/span><\/div>\n

If disc brakes aren\u2019t bedded in correctly, they can vibrate and cause noise.<\/p>\n

Bedding in disc brakes<\/a> is essential whenever you have bought a new bike or fitted new pads. The process transfers some of the pads\u2019 material to the rotor, which allows the pad and rotor to \u2018mate\u2019 better and avoid any noise-inducing vibrations.<\/p>\n

To bed your disc brake pads in, find a quiet area and ride at a walking pace and then apply both brakes evenly until you almost come to a stop. Then, release the brakes and repeat the process 10 to 15 times. You\u2019ll feel braking power increase as you go through the cycle.<\/p>\n

When you\u2019re bedding in disc brakes, make sure you don\u2019t pull on the brake levers too forcefully. This will lead to the brake stopping the wheel from turning and material won\u2019t be transferred from the pad to the rotor evenly.<\/p>\n

Pads are worn<\/h3>\n
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Don\u2019t let your pads get like these\u2026<\/span><\/figcaption> Ben Delaney \/ Immediate Media<\/i><\/span><\/div>\n

Noise can be generated if your pads are worn.<\/p>\n

If the pads are worn down to the bare metal, you\u2019ll hear the sound of metal rubbing on the disc rotor.<\/p>\n

You can generally check the condition of your pads by looking at the back of the brake caliper or by removing the wheel and checking how much pad material is left.<\/p>\n

Campagnolo disc brake pads feature a visible wear indicator. These give an audible warning when reached, too.<\/p>\n

When fitting new disc brake pads<\/a>, make sure you scrupulously clean the disc rotor and caliper to stop any old contaminants making their way onto the new pads and to allow for the best bed-in procedure.<\/p>\n

Disc rotor or brake caliper not torqued correctly<\/h3>\n
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Make sure the caliper and rotor bolts are torqued to spec.<\/span><\/figcaption> Markus Greber \/ Canyon <\/i><\/span><\/div>\n

If your disc rotor or brake caliper aren\u2019t correctly torqued, you\u2019ll often hear a metallic clanging. You\u2019ll likely find disc brake pad alignment impossible, too, because there will be play at the caliper or rotor from where they haven\u2019t been securely fastened.<\/p>\n

Make sure the disc rotor and brake caliper are tightened correctly. There will generally be a torque reading next to the component.<\/p>\n

Centrelock rotors are typically torqued to around 40Nm using a cassette lockring tool.<\/p>\n

To tighten a six-bolt disc rotor, it\u2019s best to work in a star-shaped pattern. Start by tightening one bolt slightly, then move to the one opposite and tighten evenly. Next, evenly tighten the bolt next to the first bolt you started to tighten and then opposite and so on.<\/p>\n

Bent disc rotor<\/h3>\n
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If your disc rotor is bent, you can attempt to bend it back, within reason.<\/span><\/figcaption> Jonny Ashelford \/ Immediate Media<\/i><\/span><\/div>\n

A bent disc rotor is a common cause of noisy disc brakes.<\/p>\n

To avoid this problem, make sure you don\u2019t lean your bike by its disc rotor. This might sound simple, but it\u2019s easy to accidentally bend disc rotors when you\u2019re loading your bike into the car, for example.<\/p>\n

To fix a bent disc rotor, carefully sight where the bend is in the rotor and simply bend it back with an appropriate rotor-bending tool. Avoid applying too much force because it\u2019s easy to bend a rotor too far back the other way. It\u2019s also important to avoid touching the disc rotor with your fingers because the oils on your skin can contaminate the disc rotor.<\/p>\n

Some mechanics prefer to bend a rotor back by hand. This is because you are applying less force to the rotor compared to using a dedicated tool. If you decide to do this, hold the disc rotor with a lint-free cloth to avoid contamination.<\/p>\n

If your rotor has sharp kinks in it or is bent in many places, it\u2019s unlikely you\u2019ll be able to make it straight again. In this case, it\u2019s best to replace it.<\/p>\n

If your rotor is bent in multiple places, it\u2019s unlikely you\u2019ll be able to make it straight again \u2013 or straight enough not to rub on the brake pads in the caliper. If this is the case, it\u2019s best to replace the rotor.<\/p>\n

Poor or overfilled bleed<\/h3>\n
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Caliper spacers are used for a reason.<\/span><\/figcaption> Josh Patterson \/ Immediate Media<\/i><\/span><\/div>\n

If the brake fluid<\/a> has been overfilled on a bleed, this can cause the caliper pistons to advance further, resulting in less clearance between the pads and rotor, and potential rubbing.<\/p>\n

You can identify the issue by trying to push the pistons back into the bores of the caliper with a dedicated piston press or a plastic tyre lever<\/a>. If the fluid has been overfilled, you will struggle to fully push the pistons back into the bores of the caliper.<\/p>\n

To avoid this issue, use the correct caliper spacers when bleeding your brakes.<\/p>\n

Shimano and SRAM include caliper spacers with their bleed kits, whereas Campagnolo sells an \u2018Oil Level Tool\u2019 that you fit in place of the pads.<\/p>\n

Poor facing of frame<\/h3>\n
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Check with your preferred bike shop to see if their workshop has a facing tool.<\/span><\/figcaption> Park Tool <\/i><\/span><\/div>\n

In order to perform optimally and avoid creating any noise, a brake caliper needs to be centered in its mounts. If the mounts aren\u2019t properly prepared in the factory, you\u2019ll never be able to align the caliper correctly.<\/p>\n

You may also struggle to centre a caliper in its mounts if there\u2019s excess paint around the mounting points from when the frame was sprayed. If you suspect this to be the case, the best solution is to take your frame to a bike shop that has a facing tool, which will allow them to remove the excess material and for your calipers to be centred correctly.<\/p>\n

Some noise is inevitable<\/h3>\n
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Expect some noise if you\u2019re riding in filthy conditions.<\/span><\/figcaption> Andy Lloyd<\/i><\/span><\/div>\n

Unfortunately, we live far from a perfect world. Even when your brakes are aligned optimally, you can still experience some noise from them if you\u2019ve ridden through water, grit or mud and it finds its way onto the pads.<\/p>\n

The tolerances of road bike disc brakes are much tighter than their mountain biking counterparts<\/a>. There is far less margin for error and sometimes, try as you might, you may still experience some noise.<\/p><\/body><\/html>\n

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By Oscar Huckle Published: Tuesday, 23 August 2022 at 12:00 am Disc brakes offer confidence-inspiring and consistent braking, even in wet weather. They\u2019re generally very reliable and durable components, but disc brakes can make a lot of noise if they\u2019re not set up correctly or contaminated. That noise can sound like a \u2018ting-ting-ting\u2019 as you […]<\/p>\n","protected":false},"author":24,"featured_media":40334,"template":"","categories":[1],"acf":{"readingTimeMinutes":"11"},"uagb_featured_image_src":{"full":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/08\/how-to-silence-disc-brakes-7-ways-to-fix-squealing-disc-brakes.jpg",1920,1280,false],"thumbnail":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/08\/how-to-silence-disc-brakes-7-ways-to-fix-squealing-disc-brakes-150x150.jpg",150,150,true],"medium":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/08\/how-to-silence-disc-brakes-7-ways-to-fix-squealing-disc-brakes-300x200.jpg",300,200,true],"medium_large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/08\/how-to-silence-disc-brakes-7-ways-to-fix-squealing-disc-brakes-768x512.jpg",768,512,true],"large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/08\/how-to-silence-disc-brakes-7-ways-to-fix-squealing-disc-brakes-1024x683.jpg",800,534,true],"1536x1536":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/08\/how-to-silence-disc-brakes-7-ways-to-fix-squealing-disc-brakes-1536x1024.jpg",1536,1024,true],"2048x2048":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/08\/how-to-silence-disc-brakes-7-ways-to-fix-squealing-disc-brakes.jpg",1920,1280,false]},"uagb_author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/cyclingplus\/author\/importmanagerhubsprylab-com\/"},"uagb_comment_info":0,"uagb_excerpt":"By Oscar Huckle Published: Tuesday, 23 August 2022 at 12:00 am Disc brakes offer confidence-inspiring and consistent braking, even in wet weather. They\u2019re generally very reliable and durable components, but disc brakes can make a lot of noise if they\u2019re not set up correctly or contaminated. That noise can sound like a \u2018ting-ting-ting\u2019 as you…","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/rss_feed\/40333"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/rss_feed"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/types\/rss_feed"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/users\/24"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/media\/40334"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/media?parent=40333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/categories?post=40333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}