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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New Hydraulic hoses sealed
I have a new complete set of "Shimano" 105 hydraulic calipers and brake/shifters for drops. The hoses are fitted to the calipers the other end of the hoses have the barbs fitted but they ...
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What shifters do I have to buy to fit Shimano MT200 hydraulic brakes?
i want to change my brakes from mechanical disk brake to hydraulics, as right now the braking power is absolutely abyssmal.
i came across these shimano mt200 hydraulic brake set, however it seems i ...
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What is the purpose of bedding in disc brake pads? And what if the procedure is not followed?
When installing new brake pads for disc brakes, manufacturers recommend to "bed in" the pads. For example, Magura recommends to go 30kph then brake hard and repeat this process 30 times.
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Front disk brake digs in on bumpy roads
My front brake has a tendency to dig in or dive when I use it on bumpy roads. There seems to be a degree of positive feedback in this effect, causing me to sometimes brake much harder than I intend to ...
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Can I use metallic or semi-metallic brake pads with a Shimano BR-MT500 brake set?
From the answers and comments to a question I recently asked about the brake on an e-bike, it seems that metallic or semi-metallic brake pads would be better than resin pads. The bike is frequently ...
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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, ...
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Shimano BR-MT400 caliper upgrade?
After 2 years calipers no longer retract fully (pistons) causing annoying rubbing sound.
What options do I have to upgrade it (perhaps something more durable) providing I still want to reuse the same ...
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Tektro HD-M275 rear brake making grinding noises while braking
I got Tektro HD-M275 hydraulic disc brakes with 180mm rotors, front brake is working perfectly with no issues. Under light braking rear brake works normally without any noises or vibrations, but as ...
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Brake piston fell out during bleeding - anything to fix?
When bleeding a brake, I did not insert the correct spacer, pushed the lever too eagerly, and the piston fell out (and the oil was on the floor).
Is there anything to fix after this besides just ...
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Specialized bike - Can you help identify? [closed]
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What are the failure modes of the brake rotor worn beyond limit
Background
I have been maintaining two bikes for a few years. Both have disk brakes. One has around 10 000 km on it another one is well over 35 000 km. The disks on the bike with 35k+ are now reaching ...
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Does the front hydraulic brake hose also requires foam to avoid noise?
I watched a few videos of hydraulic brakes installation and notice that people install a foam pipe over the hose for the rear brakes.
My hydraulic brake set has only one foam.
Should I install the ...
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how does rotor heat dissipation correspond to wheel size?
My brompton has disc brakes. I believe effective wheel diameter is 419mm (349 rim + 35mm tyre),
compared to 698mm for 700c + 38mm tyre. I have 160mm rotors, which for stopping power would seem to ...
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When does the braking power stop scaling with Rotor Size
It's commonly established that the braking power scales with rotor size, and an optimal braking technique is to provide enough force for the rear wheel just to lift up. However, my question is wouldn'...
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Hydraulic disc brake not retracting when braking softly
I bought a new bike last week that has Tektro HD-R280 hydraulic disc brakes. I noticed on my first test ride that the front brake was rubbing against the rotor, but only when turning left. Since I ...
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Maintenance of metallic hydraulic disc brake pistons?
I have Tektro Auriga HD-M290 hydraulic disc brakes and they have metal piston. One of the pistons sticks out more than the other and they don't come out much even though I squeeze the brake lever many ...
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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 ...
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Tektro hydraulic disc brakes chatter under load
I bought a second-hand bike in good condition, however the hydraulic brakes chatter under braking load.
Check it out:
https://youtube.com/shorts/hdDmeGFhjgk?feature=share
It's a Kona Splice with ...
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What to considering when replacing disc brake calipers?
I currently have an endurance road bike equipped with Shimano 105 hydraulic disc brake calipers. Since I am transforming it into a gravel bike, I would like to change the calipers to the Shimano GRX ...
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Hydraulic disc brake maintenance in the absence of performance issues
I see lots of questions about hydraulic brake-specific maintenance. I.e. related to the hydraulic system itself, not the pad/rotor interface. (For this question let's ignore the latter since that's ...
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Mountain bike brake pistons not compressing when brake is pulled
I have a Shimano BR-MT201 Hydraulic Disc Brake on my rear brake. I was replacing the brake pads and accidentally pressed the brake too many times and the piston popped out leaking brake fluid. ...
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Why is my brake lever loose on my hydraulic disc brake i took my wheel off and pressed the brake now the brake lever is loose and touches the grips
What i did in order :
cleaned the brake pads
-put them back in
pressed the brake lever
pushed the brake pads inwards
put the front wheel on
Now as a result of this the brake lever is loose
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What are the exact dimensions of Shimano disc brake split (cotter) pins?
What are the exact dimensions of Shimano disc brake split (cotter) pins, such as part nr. 25 (Y8DB06100) on BR-MT410 caliper (https://si.shimano.com/en/ev/BR-MT410-4663)?
Looking to buy generic ...
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Hydraulic sub brake lever as primary lever
I can see answers for this question with cables but cannot find an answer for hydraulic brakes. I am looking for a 31.8mm clamp hydraulic disc brake lever for my fixed gear commuter, and have seen the ...
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SRAM Guide R bleed problem
I'm bleeding my SRAM Guide R brakes. When working on the rear brake I noticed that the fluid can go from the lever syringe into the caliper syringe, but not the other way around. I can't move the ...
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Cross (also called in-line or sub) brake levers compatible with SRAM Apex
Does somebody know of cross/in-line/sub brake levers compatible with SRAM Apex? Could the Shimano GRX sub brake levers perhaps work?
See https://bike.shimano.com/en-EU/product/component/grx-11-speed/...
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Bleeding Promax Decipher Hydraulic Brakes
I have a Promax Decipher Hydraulic Rear Brake on a bike I am trying to repair, but no idea how to bleed the brakes. I have tried to find something out there in internet land but the two videos I found ...
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What's the significance of "Inside" vs "Outside" caliper hose connection?
When Shimano rolled over from the "x000" series mtb brakes (e.g. 6000, 7000, 8000) to the x100 series, one thing that changed is where the hose connects to the caliper. Before, it was on the ...
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Rear brake is rubbing but the caliper is as far over as it can be
The hydraulic disc brake on the rear of my bike is rubbing quite badly, even after trying to realign the caliper. The caliper is as far over on the mounts as it can be and the rubbing still persists. ...
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Shimano J-Kit installation
I'll soon be installing the BR-MT410 and BL-M4100 using the "easy hose joint system" (I assume) J-kit. The instructions look straight forward but i still have some questions.
The caliper ...
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Why is there no pressure in brakes after leak?
I made a mistake when trying to align the caliper to correct for the disc rubbing against the brake pads. Instead of unscrewing the bolts mounting the caliper body to allow adjustment, I unscrewed the ...
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Scratched hydraulic brake hose during install - should I be concerned?
today I was installing brand new GRX brakes into new frame. It was not my first time, I've already build 10+ bikes, I messed up through. I inserted rear brake hose without any issues, I had my guide, ...
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Is degassing DOT brake fluid before a bleed still a thing?
I recently bled old AVID Juicy 3 hydraulic brakes and followed the procedure described in this AVID Bleed Procedure video (starts at the relevant section). While preparing the syringes, the technician ...
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Mechanical bike disc brake caliper lever
Where can I find a data sheet for this part? I want to know if there is a magnification factor between the force which acts on the disc brake by pads, and the force that I pull the wire with, as I ...
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How do I replace one oil with another in a Shimano brake system?
Having seen this question about correcting the "wandering bite point" problem common with Shimano brake systems, I intend to replace the standard Shimano mineral oil in my brakes with the ...
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How long do new rotors take to break in?
I mounted new rotors a week ago, and today they make a crunching noise just as terrible as on day one. It's a sound that makes you think a small rock is stuck between your pads, except there isn't. I ...
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On road repair for hydraulic brakes
What are the possible on-road modes of failure for hydraulic bicycle braking systems, and what can a touring cyclist do to be prepared for their eventuality? What can one carry as an emergency backup ...
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Can i adjust Avid Elixir R SL hose angle without bleeding?
I would like to adjust the angle of the brake hose coming from the caliper. I think this can be done by moving this part which should is called banjo i think.
I would imagine I would need to loosen ...
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Oil stopper of Shimano oil funnel: what's its sharp end for?
Shimano instructs to insert the sharp end of the "oil stopper" to bleed the brakes:
What is this for? I would expect that the oil should just flow from/to the funnel when pumped into the ...
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Bleed or flush old oil before brake removal and storage?
I'm about to replace my stock Shimano BR-MT400 hydraulic disc brakes. The cables are external. I think I have a sense of how to install, bleed and bed-in the new Maguras, but is there some best ...
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Is it possible to use SRAM brifters with non-SRAM hydraulic brakes?
"SRAM hydraulic brakes are issue-prone."
Even if this is a damning blanket statement heard about a major parts manufacturer, I am not here trying to argue it. It is simply a premise of my ...
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Shimano BR-M395 hydraulic brake pads keep rubbing
I've replaced the brake pads of my bike, Shimano BR-M395 with some BS03S (there were originally BS01S, but I have been told they are identical), but the new pads just keep on rubbing.
I've even taken ...
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How to tell what service my MTB front hydraulic brakes need?
The front Shimano SLX (m7120) hydraulic disc brakes on my trail bikes have lost their mojo. It still brakes but less aggressively than a year ago. Possible causes are worn pads and air bubbles in the ...
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Magura brake pad change: friction noise?
After replacing my worn-out Magura brake pads (MT4 brakes, 7P brake pads), I now have a continous light friction noise when the wheel is spinning (front wheel).
The brake disc is brand new as well. ...
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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 ...
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Can't seem to quiet my disc brakes
I recently purchased a bike that clearly needed fixing, for a great price. I've given the bike a bit of a tune-up, but one thing that won't seem to go away is the squealing sound coming from the disc ...
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Shimano hydraulic brakes underperforming - water fixes the issue
I have a Shimano XT BR8100 system, all was good until I did some maintenance. Probably I did something wrong, trying to understand what. Did a normal procedure to replace oil and pump out air.
Visible ...
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Hydraulic Disc Brakes still Spongy after bleeding?
I have Tektro HD-M276 Hydraulic Brakes that were recently spongy (front brake).
After bleeding the system and topping the fluid off, the bite was much firmer, but when I test rode it, the braking ...
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Mechanic told me to replace the entire brake system because of "slow return"?
A bit of back story first: I bought a second-hand bike in 2020. It has SRAM Level TL installed from the start. It caught my attention that brake lever didn't return to the end and had very little ...
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Shimano Dura-Ace R9120 lever leaking
My bike's Dura-Ace R9120 rear-brake/front derailleur shifter (left shifter in UK) leaks brake fluid when I pull hard on the lever. It leaks from this specific place:
I understand this lever is ...
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