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Jun
26

Macky Franklin Blog: Centering disc brakes

I love disc brakes. LOVE THEM! They're more powerful than rim brakes, less affected by inclement weather and new rotors are a lot cheaper than new rims. That being said, one of the things that annoys me the most is when my disc brakes rub. Partly it's that I don't like doing more work than I need to, but mostly it's the noise. I hate riding along and hearing "schwing, schwing, schwing" or, even worse, a single high-pitched note as if my brakes are trying and failing to sing.
Luckily, it's pretty easy to center your disc brakes and make them stop rubbing. In the following video, I explain the three methods that I have found to be the most effective and at the end talk about straightening a bent brake rotor.
As always, if you don't like videos, here's a non-moving-picture explanation:
<h2 style="text-align: center;">Method 1: The easy method (try me first)</h2>
[gallerycarousel columns="3" exclude="1870, 1868, 1865, 1864, 1863, 1862, 1861, 1858, 1857, 1855, 1854, 1853, 1852, 1851, 1850, 1849, 1848, 1846"]
<h2 style="text-align: center;">Method 2: The paper method (try me next)</h2>
[gallerycarousel columns="3" exclude="1870, 1868, 1865, 1864, 1863, 1861, 1855, 1854, 1853, 1850, 1849, 1848, 1846"]
<h2 style="text-align: center;">Method 3: The do-it-by-feel method (if all else fails)</h2>
[gallerycarousel columns="3" exclude="1870, 1866, 1862, 1860, 1858, 1857, 1856, 1854, 1852, 1851, 1850, 1849, 1848, 1847, 1846, 1845"]
<h2 style="text-align: center;">To straighten a bent rotor</h2>
[gallerycarousel columns="3" exclude="1868, 1866, 1865, 1864, 1863, 1862, 1861, 1860, 1858, 1857, 1856, 1855, 1853, 1852, 1851, 1847, 1845"]

I love disc brakes. LOVE THEM! They're more powerful than rim brakes, less affected by inclement weather and new rotors are a lot cheaper than new rims. That being said, one of the things that annoys me the most is when my disc brakes rub. Partly it's that I don't like doing more work than I need to, but mostly it's the noise. I hate riding along and hearing "schwing, schwing, schwing" or, even worse, a single high-pitched note as if my brakes are trying and failing to sing.

Luckily, it's pretty easy to center your disc brakes and make them stop rubbing. In the following video, I explain the three methods that I have found to be the most effective and at the end talk about straightening a bent brake rotor.

As always, if you don't like videos, here's a non-moving-picture explanation:

Method 1: The easy method (try me first)

Loosen the caliperPull the lever of the brake you are centeringAlternately tighten the top and bottom bolts
in small increments while holding the brake leverCheck that the brake is centered
Tighten
the caliper firmly while holding the brake lever   

Method 2: The paper method (try me next)

Loosen the caliperGet a small (1″x2″) piece of paperFold the paper in
halfPut the folded piece of paper on the rotor
Spin the
rotor to get the paper in between the pads of the caliper (you may have to remove your wheel and install it with the paper in place)Pull the lever of the brake you are
centeringAlternately tighten the top and bottom bolts in small increments while
holding the brake leverRemove the paper from the rotor
Check that the brake is
centeredTighten the caliper firmly while holding the brake lever  

Method 3: The do-it-by-feel method (if all else fails)

 Put a piece of
white paper under the caliper Make sure you can see the paper through the caliperLoosen the bolts Tighten the top bolt
while making sure there is even space on either side of the rotor 
 Tighten the bottom bolt while making sure
there is even space on either side of the rotorTest that the brake is centered  Hold the brake lever and
tighten firmly 

To straighten a bent rotor

Check for spot-specific rubbingFind the spot on the rotor that is rubbingIf it is only
slightly bent, try bending the rotor by handIf you need more leverage, use an Allen key or similar long tool
(screwdriver)
Bend the rotor using the tool as a leverCheck that the rotor is straight  

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