Bicycles Stack Exchange
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Questions tagged [hydraulic-disc-brake]

Hydraulic disc brakes use fluid (either mineral oil or automotive brake fluid) to transmit brake pressure from the handlebar levers to the disc brakes on the wheel.

Hydraulic disc brakes use fluid (either mineral oil or automotive brake fluid) to transmit brake pressure from the handlebar levers to the disc brakes on the wheel.

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Why would hydraulic calipers (not rotors) only be compatible with resin pads?

These calipers aren't supplied with rotors, so the answer to the very similarly titled What features make a disc brake caliper unsuitable for use with other than resin pads can't possibly apply. Shimano MT200 brakes are listed by several dealers as…
Chris H
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What happened to the hydraulic disc brakes on my new bike?

I bought a new Ortler electric bicycle a couple of months ago. My wife used it for a couple of weeks to ride to work each day. The brakes squealed from almost the first day. After a couple of weeks, the rear brake started getting weak and then…
JRE
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Using non-brand oil for cleaning brake pistons

I am having some problems with rubbing disc brakes and came to the conclusion that it might be because of "sticky pistons". I would like to clean and lubricate them, as here. This video instructs to use the same brand oil for cleaning them as is…
Szabolcs
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why can't you use park tool shift cable cutter to cut hydraulic cable

I was going to use my parktool cable cutter on the hydraulic cable for my reverb. I would potentially service my hydraulic shimano disc brakes cables if I ever need to. But another thread has said you shouldn't. if it can cut metal why not…
Ageis
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Top up hydraulic brake fluid?

So I've just gotten a new bike which has disk brakes, and it's my first time using disk brakes. One of the brake pads is rubbing a little on the rotor, so I decided to turn the barrel on the lever anti-clockwise to "take some tension off the cable"…
frenchie
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odd noise on new disc brakes

After 200 miles on my LaPierre X Control 229 equipped with basic Avid hydraulic disks, I can hear the front wheel disk ventilation slots grinding through the caliper when I brake moderately! (Shimano 160 disk). I did the normal thing of re-aligning…
Mountain Man
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GRX disc brake loses power when slowly braking

I have a GRX 400 hydraulic caliper and a GRX 600 2 speed front shifter. When I pull the front brake lever hard, the brake works as intended. If I pull it slowly, or repeatedly tap it, then I lose power. Specifically, if I pull the lever just enough…
overfull hbox
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How to get a broken torx bit out of a bleed screw?

In the latest episode of my disastrous bike maintenance attempts, I got a sub-standard torx bit that broke off in the bleed screw of my Tektro Vela disc brake caliper. Here's a sligthly overexposed picture of the brake caliper in question, the bleed…
HAEM
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Hydraulic Brake lever becoming stiffer

What are the factor(s) that would make the brake lever of a hydraulic brake become stiffer over time? By stiffer, I mean that the lever becomes more difficult to pull, it offers more resistance and I need to exert more force in order to apply the…
PeteH
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What are real advantages of brake hose junction connectors?

I just received my new brake callipers and handles. They come pre-assembled with hoses and a "hose junction connector". These are the same as Dan Lloyd has in the below video: I understand the advantage of these when there is a need to work on…
Superman.Lopez
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Why would anyone use DOT fluid and vacuum-based brakes?

Mineral oil is much less toxic than DOT, does not absorb water, has higher boiling point. Bleeding Shimano brakes is almost as easy as unscrewing the caliper bolt and pouring oil into the lever system. On the other hand, for Avid-s one needs to…
Vorac
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Why do we bleed at the brake lever and at the caliper in Hydraulic brakes?

I have been trying to understand about the bleeding process. While there are many videos and explanations online how to bleed, my question is simple: If the oil from the pump can travel to the caliper & vice versa, why do we need to bleed both when…
yuvalon
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Can I avoid rubbing by enlarging the gap between the brake pads on hydraulic disc brakes?

My front brake rotor is rubbing against the pads as the gap is very narrow between the pads and the wheel is not completely true. Is it possible to remove the brake pads and enlarge the gap a little bit to avoid rubbing?
Ender
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disc brakes start squealing after just a bit of use

The rear disc brake on the Jitsie Varial 24" Hybrid that I recently got (for Christmas, so about two weeks ago) started squealing and losing its power. This was also a problem on the hardtail mtb that I was riding on before. I've cleaned the rotors…
Max Marcus
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Can broken caliper be fixed?

I have a broken hydraulic caliper and am wondering if it can be fixed? Can I buy the half that the broken mount is on or would it be better just to buy a new one?
Paul
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