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.

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1answer
2k views

Shimano hydraulic disc brake lever and caliper compatibility

My bike has Shimano BR M775 brake calipers and BL M775 brake levers. The right lever for the rear brake has a broken screw in the reservoir, so it needs replacement. As BL M775 is no longer available ...
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2answers
2k views

Leaking lever - Shimano brakes M365

i recently took my bike to the LBS for brake service. Everything was fine until i noticed that the right lever (back brake) was leaking. Every time i press the lever, it sort of "burps" a bit of oil ...
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7answers
1k views

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 ...
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2answers
2k views

Hydraulic to mechanical conversion - cable routing

A family member has asked me to convert their hydraulic disk brake system (an old Hayes So1e) to cable disk brake. I believe the bike is only going to be used casually, so performance isn't paramount, ...
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1answer
2k views

TRP HY-RD brake pistons won't retract to take new pads [duplicate]

I'm replacing pads on my TRP Hy-Rd brakes. These are cable actuated hydraulics. Using tire levers, wrenches, etc. I have not been able to push the two pistons far enough apart to fit the rotor between ...
3
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1answer
139 views

Alternative way for truing disc brake rotor after a couple of truing procedures

2 days ago after the last ride my front rotor (Ashima AiRotor 203mm) twisted again in a small area on it (not hit in obstacle or overheated), I was almost ready to throw another half an hour from my ...
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2answers
852 views

Hydraulic disc brakes on cross bike (post mount)

I have just bought some post mount calipers (Shimano) to fit on a cyclocross bike and separately some 160mm discs. The calipers do not quite sit flush on the post mounts (front or back) before the ...
4
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3answers
1k views

Can I use Avid olive and connector insert in a Shimano brake?

Basically, this is the question: I can use the olives and connector inserts proper for Avid in a Shimano Deore M596 brake/hose? Has anyone tried and can report if it worked perfectly or if there was ...
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1answer
474 views

BR505 disc vs Ultegra 6800 caliper

I'm looking to get a built bike with either Shimano BR505 disc brakes or Ultegra 6800 caliper brakes. The bikes I'm looking at basically have the same frame and components. They both have the same ...
3
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2answers
2k views

How to tighten SRAM HRD Rival brake lever?

I have SRAM Rival HRD brake/gear shifters on my cross bike. It's a 1X setup. The left brake lever (this is the UK where rear brake lever is on the left, so it's the rear brake lever only) has lateral ...
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1answer
186 views

Will I be disappointed with these brakes? [closed]

I have a cyclocross bike, it came with Tektro Lyra brakes - they were useless so I fitted a flat bar so I could use my spare hydraulic MTB brakes. I'm just about to buy some new brakes to replace the ...
4
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2answers
250 views

What to replace after using WRONG hydraulic fluid

Tektro Auriga Comp hydraulic brake. I needed to add fluid to my brake, and decided to do a bleed. I used DOT 3 fluid instead of mineral oil (Very stupid me). after a few days my brake went dead (there ...
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1answer
2k views

Brake lever leaks. What to do?

My bike uses Tektro Auriga M290 -brakes. They've been great, but few months ago I noticed that there was some air inside the system. I didn't do anything and continued to use my bike. Yesterday I find ...
8
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2answers
806 views

Shimano Hydraulic brake 90-degree angle hack

Does anybody know of a way to get Shimano Hydraulic brake hoses to exit the levers at a 90-degree angle? I ride a recumbent and at the moment I have to put up with a huge loop in front of my eyeline ...
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1answer
2k views

Remove SRAM Guide with internal routing

I want to remove my SRAM Guide RS rear brake (to replace it with Shimanos). The frame has internal routing, so I need to keep the DOT fluid from coming out of the cable when pulling them through the ...
3
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1answer
314 views

Repeated Disk Contamination

I have a set of Shimano m785 calipers with Saint RT81 rotors. Every week or so they squeal and severely lose braking performance (mainly the front). Using disk brake cleaner and a touch of sanding I ...
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3answers
375 views

What considerations are there around replacement of cable-actuated disc brakes with hydraulic-actuated calipers?

I have a Dawes Discovery 401 hybrid bike that was fitted with QuadQMD-6 mechanical disc brakes. I like the bike but the brakes are beginning to show signs of wear and direct replacements are not ...
0
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1answer
832 views

Shimano disc brake hose compatibility

I have a bike with Shimano XT disc brakes, model BR M775, which have too short brake lines for my new stem. So I want to replace them with longer brake lines. But when I go shopping for brake hose, ...
4
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1answer
1k views

Max pressure of hydraulic mtb lever

i'm considering a machine build based on MTB hydraulic lever brake and I would like to know if the lever, pushed by hand, will handle 13 bars /190 PSI ? I'm really new to this kind of measurement.
4
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1answer
135 views

Too long hydro line

I've bought a new rear hydraulic disk brake (shimano m355) to replace a broken one. It works fine, but when installing I've noticed that the tube from the lever to the brake is too long for my bike. ...
3
votes
1answer
817 views

Not enough clearance on road discs for rotor (rotor rubbing)

I'm building up a 2014 specialized awol frame with fulcrum red power wheels and trp hylex brakes. I'm using the rotors that came included with the trp's. My issue is that there does not seem to be ...
0
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2answers
895 views

Tektro brake bleed block size?

The bleed kit for my Tekro HDC 330 hydraulic brakes did not come with a bleed block. I've seen a 15mm ring spanner mentioned as a suitable alternative, but would prefer to make/buy the correct tool. ...
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1answer
777 views

Replacement brake pads for SRAM Force 1/CX 1

I'm looking to replace the default pads that come with the SRAM Force 1/CX 1. I can't tell if they're metallic or organic. I ended up purchasing the organic version https://www.competitivecyclist.com/...
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1answer
1k views

SRAM hydraulic brake weak - new bike

I bought a new gravel bike (Serious Grafix Pro) with SRAM hydraulic disc brakes. The rear one has very weak stopping power. I can pull the right/rear brake lever completely to the handlebar and the ...
2
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1answer
173 views

What's this linchpin on hydraulic brakes

I just got a new bike with SRAM Level Hydraulic disc brakes. After riding it home, I noticed both the front and rear brakes have a silver linchpin holding something in place. It almost looks like it's ...
6
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2answers
5k views

Can road disc calipers be mounted on a mountain bike?

Are the mounting posts and position for road disc brake calipers the same as or similar enough to mountain bike disc calipers that you could put a set of road disc brakes on a mountain bike or vice-...
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0answers
765 views

SRAM Drop bar to MTB hydraulic brake interoperability

In a previous question I asked about compatibility of drop bar shifters with mountain bike derailleurs. Now I'm curious about drop bar hydraulic brake lever compatibility to mountain bike hydraulic ...
4
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2answers
9k views

Disc brake rotor compatibility and recommendation

I have Ultegra BR-RS805 flat mount hydraulic brakes on my gravel bike, and Shimano RT86 6-bolt Ice Tech 160mm rotors. There's a shim between the brakes and the frame to fit the 160mm rotors. When the ...
4
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2answers
927 views

Are hydraulic disc brakes more sensitive to rubbing with warped rotors?

Unlike mechanical (cable) disc brakes which feature a brake pad spring and where you have to adjust pad distance manually; hydraulic disc brake pad distance is regulated automatically and many hydros ...
6
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2answers
4k views

Converting road hydraulic disc brakes to flat bar : Possible?

I bought a road bike recently and find the road position too uncomfortable for commuting in the city, especially for reaching the brakes fast and slaloming between cars. Therefore, I would like to ...
3
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2answers
204 views

Hydraulic brakes, cold causes 0% braking capacity

Its recently been cold, around 0 degrees C at night, where my bike is stored in the outside shed. Ive replaced the pads, and bled the brakes around 6 months ago. When taking out my bike it has 0% ...
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3answers
2k views

Can the length of disc brake hose influence braking power?

I recently installed new brakes (Shimano SLX 675), shortened hoses for front/rear brake, done bleeding but even after that rear brake lever feels much softer than front. (I had identical issue with ...
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4answers
2k views

Disc Brakes *Completely* Ineffective

Over recent months my front and rear disc brakes (Hy Rd TRP on my Genesis Croix de Fer) have become increasingly useless, to the extent that I now have to cycle very slowly because it takes at least 5 ...
6
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1answer
1k views

Is there a distinct look for contaminated disc brake pads?

I have sintered pads and I'm trying as best as I can to diagnose a braking issue. I have Shimano XT M8000 callipers and the rear brake is being something of a pain. If I leave the bike for about 4 ...
3
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1answer
2k views

Brake oil came out of the piston of my Tektro hdc 300 and the brake is not functioning. What to do?

One day, I tried to disassemble my hydraulic braking system (Tektro HDC 300) having a goal of dipping the brake pads in alcohol. Well, I had somehow managed to separate the pads and the spring like ...
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1answer
3k views

Clark's skeletal hydraulics issues

I know this is an older less expensive brake system so not sure of my best options. The brake lever are quite firm so is there a way I can remove a bit of the hydraulic fluid from the system? I also ...
3
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2answers
7k views

Hydraulic brake not retracting sufficiently off the disk?

Sorry if this has been asked before (if it has, I haven't found it). I have Shimano hydraulic disk brakes (type BR-M486). The front one is beginning to make a slight noise even when I'm not using it:...
2
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1answer
3k views

Hydraulic disc brakes and road shifters

I want to build a road/cyclocross bike with a Dura Ace 9000 rear derailleur and a matching shifter (Dura Ace 9000), but I really want to have disc brakes as well. My understanding is that a mechanical ...
2
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1answer
2k views

Mystery leak from brake caliper. What to do?

I had poor performance from my SRAM Apex hydraulic disk brakes. This weekend, I bled them, and it seemed to solve the problem. However, on my next ride, I decided to test the newly bled brakes with a ...
6
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1answer
1k views

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 ...
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3answers
2k views

Can I intentionally overfill my hydraulic brakes to adjust contact point?

I have a bike with SRAM Apex hydraulic disc brakes. They do not have contact point adjustment, but I want the lever to firm up earlier in its travel. Can I just overfill my brakes with fluid to adjust ...
2
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2answers
293 views

How can I bleed my hydraulic disc brakes without buying a kit?

Is it possible to bleed hydraulic disc brakes without buying a kit? If so, how would I go about doing it? I have Shimano BR-M355 brakes, but the question is also applicable to other manufacturers. ...
0
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1answer
225 views

Disk Brakes on Nishiki Pueblo [duplicate]

I have a Nishiki Pueblo and I am looking to put disk brakes on it. My problem is that I am not sure which disk brakes fit on my bike. Thanks in advance.
3
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1answer
465 views

how can I fix an uneven hydraulic disk brake set

I have a cargo bike (http://www.christianiabikes.com/en/product/26/) with front wheels having bengal helix 7.5 hydraulic disk brakes. Inexperienced me, I have taken off the caliper from the rotor on ...
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1answer
82 views

Replacing fork and hydraulic brakes

I had a 2012 29er Giant Talon that got a bit trashed a few years back, so I bought a new bike which was recently ripped off. As a result I am currently trying to get my Talon in working condition ...
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1answer
2k views

Hydraulic brakes not working

I recently got my first bike with hydraulic brakes. The brakes made some strange squealing sounds, so I took it apart to see what could have been the problem. I took out the pads and cleaned them, ...
13
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4answers
8k views

Can storing bicycles upside-down damage hydraulic brakes?

I usually store our bikes for the winter hanging upside down by the wheels from the rafters. I would assume that I can't do this with a hydraulic disc brake bike: am I correct?
6
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1answer
4k views

Are there any adjustments for hydraulic brakes?

I prefer stiff, touchy, on/off, brakes. When I was using mechanical disc brakes, I always adjusted them so that the pads were almost touching the rotor. This provided the short lever travel I was ...
9
votes
1answer
2k views

Shimano RS785 hydraulic disc brake caliper will not reset

Brand new RS685 lever and RS785 calipers. I installed the front with no trouble. Shortened line, bled, ready to go. The rear, however, was a problem. I shortened and bled the line same as the ...
1
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1answer
611 views

Shimano M355 brake handle parts

My son has a Diamondback Recoil Comp MB with Shimano M355 brakes. The rear brake lever got messed up somehow. The snapring that holds the plunger/piston into the master cylinder assembly got popped ...