Eliminate Disc Brake Pad Rub In 60 Seconds On Your Bike

Why Your Disc Brakes Rub (And How to Fix It Fast)

That ticking, scraping, or whooshing sound from your disc brakes is pad rub. It's the most common brake complaint we hear, and 90% of the time it's a simple fix you can do in under a minute. No tools required for the basic method.

Before you start pulling things apart, watch the video below for the quick visual walkthrough. Then read on for the details and what to do if the simple fix doesn't work.

Tired of the constant squeak from a rubbing rotor? Fix it in 60 seconds with 2 simple tools. Need replacement pads or rotors? Check out Loamgoat.com Let me know if this helped you or other topics for bike related videos you'd like to see in the comments blow. If you need pads or more, head to https://loamgoat.com

Understanding Why Pad Rub Happens

Pad rub has three main causes, and they're all fixable:

• Caliper misalignment. This is the most common cause. Your caliper needs to be perfectly centered over the rotor. Even half a millimeter off and you'll get rub. It happens after wheel removal, travel, crashes, or just from riding. The fix below takes 60 seconds.
• Sticky pistons. Over time, dust and grime build up around the piston seals. One piston pushes out farther than the other, and the pad on the sticky side doesn't retract fully. This needs a proper piston cleaning, which is a separate job.
• Bent rotor. A rotor that's taken a knock will wobble as it spins. You'll hear rhythmic rubbing that comes and goes with each wheel rotation. Minor bends can be straightened with a rotor truing tool or an adjustable wrench. Major bends mean it's time for a new rotor.

The 60-Second Caliper Alignment Method

1. Loosen the caliper mounting bolts. Use a 5mm Allen key. Loosen them about one full turn each. Don't remove them. The caliper should now float freely on the mount.
2. Squeeze the brake lever and hold it. This centers the caliper over the rotor by letting the pads clamp evenly on both sides.
3. While still holding the lever, tighten the bolts. Alternate between the two bolts, tightening each a little at a time. Torque to spec (usually 6-8 Nm).
4. Release the lever and spin the wheel. If the rub is gone, you're done. If there's still a slight rub, repeat the process. Sometimes it takes two tries.

When Rub Means Something More Serious

If the alignment method doesn't solve it, the issue is deeper:

• Sticky pistons: Remove the pads, gently push both pistons back, then pump the lever to extend them. Clean around each piston with isopropyl alcohol and a cotton swab. Push back, extend, clean. Repeat until both pistons move evenly.
• Bent rotor: Spin the wheel slowly and watch where the rotor contacts the pad. Use a rotor truing tool to gently bend it back at that spot. Work in small adjustments.
• Worn pads: Pads worn down past the minimum line won't retract properly. Check your pad thickness while you're troubleshooting.

Most pad rub is a 60-second fix. Don't ride with it. That constant dragging kills your speed, wears your pads unevenly, and wastes energy on every ride. Browse replacement pads if yours are due for a swap.

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• How to Fix a Rubbing Hydraulic Disc Brake, the full diagnostic and alignment walk-through