Icycle disc brakes rotor squeal zip#
Cinch it down, cut off the excess zip tie and be sure the head is positioned in a way that it won’t cut your leg or ankle.Ī simple fix to hydraulic brake resonance: a zip tie © Cyclocross Magazine In the case of our test bike, this was about six inches above the brake caliper on the seatstay. Take the zip tie, and cinch the hydraulic hose to the frame wherever it’s not already clamped securely. A simple zip tie or two can eliminate this dreaded howl. Some call the howling noise disc brake squeal, screech, or even a “turkey warble” sound. If you’ve replaced your pads, cleaned your rotors with isopropyl alcohol and followed our tips on properly adjusting a disc brake, and the howl or screech still persists, it’s time to take a look at your frame.ĭo you have a hydraulic hose that has a bit of slack in it? Or have a stretch of hose, more than eight inches or so, that could use an extra clamp to the frame? Or hydraulic hose guides/clamps that don’t have a tight grip on the hose, allowing the hose to rattle? Turns out, the hydraulic hose could be vibrating under braking, and at a certain frequency, the vibration wreaks havoc on the hydraulic system, pulsing the brake and causing that dreaded, embarrassing howl.Ī telltale sign that you might suffer from this problem is your brakes howling only at certain speeds and braking loads-typically going down steep hills in our experience. Hydraulic disc brakes add another layer of complexity, with resonance being a factor when the hydraulic line and frame vibrate under braking load. There are many factors that could cause howling disc brakes, such as rotor or pad contamination, improper setup or a bent rotor.
Sound too good to be true? Don’t judge yet.
If you’ve ever experienced noisy or howling hydraulic disc brakes on your cyclocross bike, this week’s Mechanical Monday solution costs a few cents, takes just a few seconds, has saved some custom builders thousands of dollars, and will help you stop pulling out your hair in attempt to quiet your bike.
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