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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2answers
2k views

Convert MTB mechanical disk brakes to hydraulic

I want to convert my mechanical disk brakes to hydraulic. I don't know what size calipers to get. I plan on using the same rotors.
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1answer
2k views

Shimano bolts; oversized hex driver holes? Planning for failure?

This is frustrating me. I recently bought Shimano Dura Ace ST-R9120 hydraulic levers/BR-R9170 calipers combination. Got to the stage of bleeding the brakes and removing the bleed caps from the tops of ...
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1answer
4k views

Is there way to fix a disc brake rotor if slightly bent?

Rear disc on my Acid 2016 is little bit bent so while riding it makes a strange noise when that part of disc comes through the caliper. Is there any way fix that or should I buy new disc?
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2answers
2k views

Can I swap front & back brake levers on Shimano ST-RS685? (hydraulic road disk brakes)

I have Shimano ST-RS685 hydraulic disk brake set. I'm used to having front brake lever on the right and rear on the left. (UK). But this bike has front on the left and rear on the right. Is it ...
8
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1answer
15k views

How to install pre bled brakes with internally routed frame

I have a 2017 Salsa Mukluk with an internally routed rear brake. I bought Shimano XT hydraulic brakes to replace the low end mechanicals that came on the bike. My problem is that the brakes came pre-...
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1answer
3k views

Maintenance on hydraulic disc brakes

With a bike featuring Shimano 486 Hydraulic Disc brakes and levers, what should I do if I wanted to maintenance them? I have no experience of brakes other than V-brakes so where do I begin? The front ...
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3answers
9k views

Can a Shimano XT (mountain) hydraulic disc brake caliper be used with an Ultegra STI road brake lever?

Specifically, is the XT BR-M8020 mountain caliper compatible with an Ultegra hydraulic road brifter like like the ST-R8020 or ST-R8070? I have confirmed that they both use BH90 brake hose ("high ...
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0answers
220 views

Hayes Sole Disk Brakes, adjusters stiff/seized?

Second hand bike, my first time encountering Hayes Sole brake calipers. My brakes front and back have gone a bit weak so I wanted to tighten them up a bit. Each side of caliper has an allen key ...
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1answer
321 views

Tektro HTC 300 hydraulic fluid leakage

I made the mistake of pulling my brake leaver whilst the wheel was off, so the piston came out, and I lost quite a bit of oil. I pushed the piston back in, and proceeded to follow the bleed ...
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2answers
461 views

Brake fluid replacement

Whilst replacing my pads I made the mistake of pulling the brake lever, which pushed the piston too far, and thus lost loads of fluid. I've searched online for the type and quantity of fluid to ...
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1answer
2k views

How much more expensive are hydraulic disk brakes compared to mechanical disk brakes?

How much more expensive are hydraulic disk brakes compared to mechanical disk brakes? I'm asking this to determine which parts contribute to price differences across different models and brands. Is ...
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4answers
3k views

Are bleeding kit syringes single use?

I recently bought a bleed kit (for shimano brakes from shimano) and used it on my hydraulic brakes (successfully as far as I can tell). During cleaning up I noticed the syringe says it was for single ...
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1answer
74 views

Bike brake bleed question

so after bleeding my Tektro mineral oil brakes, the brakes appear to no longer be functional. when I depress the lever until it touches the handle bars. I am still able to spin the wheel. I think it ...
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2answers
8k views

Hydraulic disk brakes vs hydraulic rim brakes

I am considering buying a new bike and have two models in mind. One features hydraulic rim brakes from Magura and the other has hydraulic disk brakes. Despite searching on the Internet and asking bike ...
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2answers
444 views

Rear disk brakes stopped working in Trek DS 2

I have recently bought my first disk brake bike and after having the first ride, I noticed a slight rear disk brake rubbing noise. So, next day I decided to have a look and reposition the brake. Since,...
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2answers
111 views

Spongy brakes/ deeper brake press

My hydraulic brake (both left and right) has gotten weaker. I don't know how to say it, but it's like my brakes can now be pressed deeper. My front brake is so bad that it is touching the grips. I got ...
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1answer
48k views

Shimano Hydraulic Disc Brakes vs Tektro Hydraulic Disc Brakes [closed]

My current bike has this brake set: "Tektro HD-M285 post mount hydraulic disc brakes with 160mm 6-bolt rotors and Tektro levers." I have read many places online that people prefer "Shimano M315, ...
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1answer
1k views

What did I just do? Fluid shot out of my handlebar when pushing my caliper in

I just bought a new road bike with hydraulic disc brakes, using a Shimano Ultegra R8020 Groupset. The pad was rubbing on the rear rotor and it wouldn't recenter when pumping the brake. The brake lever ...
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1answer
1k views

Can hydraulic disk brakes be incrementally upgraded?

Background: I used to have a bike with Magura HS33 hydraulic V-brakes which I liked a lot. A while back I bought a new bike with Shimano M395 disc brakes. I've had the bike a little over a year now ...
4
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2answers
906 views

Interoperability of hydraulic disc brakes and levers between model lines/manufacturers

My bike came with Shimano Deore XT M765 hydraulic disc brakes and Shimano Deore XT M756 hydraulic levers Dual Control units. I wonder whether the calipers from one manufacturer can be connected to ...
3
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1answer
2k views

Disc of front brake rubs under force

I ride a road bike with carbon frame and fork an hydraulic flat mount disc brakes. A fews days ago the front disc was slightly rubbing on the braking pad, so I readjusted the position of the braking ...
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2answers
722 views

Does an adapter for a flat mount caliper to post mount fork exist?

I have a CAAD12 disc which I'd like to fit SRAM Force 22 hydraulic to. I've been a bit enthusiastic buying things without really researching all the pitfalls of the different bits and bobs that go ...
4
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1answer
712 views

Steps to remove Ultegra and install SRAM Force disc brakes with internally routed hose

I have a CAAD12 disc with Ultegra, but I prefer SRAM, so I have got some nice new Force levers & calipers that I need to fit. This is my first experience with disc brakes. The front setup isn't a ...
3
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1answer
900 views

Quad QHD-4 Axis Disc Brakes stuck (can't push open)

I have Quad QHD-4 Axis Disc Brakes that were probably never maintained and are stuck. There was a lot of grime and dirt all over, the pads even rusted a bit. It probably locked due to this and I also ...
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1answer
1k views

Front hydrulic disc brake keeps going soft

I have some shimano disc brakes on my mtb. I have noticed every now and then the front brake lever goes soft. so much so I can't even fit one finger behind the brake lever. However pump it then I can ...
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2answers
3k views

Brand new bike. Briefly removed the rear disc brake caliper, now it's too tight

I have a 2017 Cannondale Synapse Carbon Disc 105 with less than 10 hours of ride time on it. (I got it in March as unsold stock from last year) I noticed that after I had ridden for a little while, ...
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1answer
3k views

Tektro Draco hydraulic disc brake not gripping rotor well enough to stop

I have two Motobecane commuter bikes with Tektro Draco hydraulic brakes. For several years we lived an apartment where the bikes had to hang vertically on a wall which would cause the brakes (...
2
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1answer
103 views

What type of Hayes hydraulic brake is this?

I am having trouble finding out which brake set from Hayes this is. I think they are from around 2003 or so. The brake levers were spray painted and I can't see anything about them anywhere. I'm ...
5
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4answers
6k views

Are disc brakes weak? And what is "bedding in"?

I've owned a couple of department store bicycles in the past with caliper brakes and I set the brakes up properly so when I squeezed the brakes the bike stopped pretty quickly. I test-rode a bicycle ...
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1answer
853 views

Hydraulic brake not working well

Recently I flipped my bike upside-down to get the wheel out as I don't have a workstand. Now the brake is not biting until the brake lever is on the handlebar. Is there anyway to fix this? Both the ...
6
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1answer
2k views

What are the reasons for these two very different post mount adapter designs?

I'm looking to adapt my 160mm post mount front fork to accept a 180mm rotor. As I'm looking between adapters, I find them falling into two very distinct categories, and I'm wondering if there are any ...
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2answers
3k views

Shimano SM-RT900 Dura Ace Center Lock Rotor on Ultegra

Is it possible to fit the Dura Ace Rotor (SM-RT900) if you have the Ultegra R8020 hydro disc . ?
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3answers
1k views

Magura rim brake does not work well on a new rim

I have a bike with 20inch wheels and Magura HS11 rim brakes. On the rear wheel I have just replaced the rim, because the old one had split after many thousand kilometres. The new rim is an Alex DM24 ...
3
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1answer
644 views

In shop maintenance - Specialized

I have been riding less than 6 months, mainly commuting to and from work. I got a Specialized Crosstrail Sport 2017. Now, when I bought the bike, they suggested I bring it in every 3 months for ...
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1answer
3k 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
5k 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
2k 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
4k 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 ...
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1answer
262 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
1k 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 ...
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5answers
3k 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
662 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 ...
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2answers
4k 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
193 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
621 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
5k 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 ...
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2answers
2k 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 ...
1
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1answer
4k 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
votes
1answer
387 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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