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.

Filter by
Sorted by
Tagged with
0
votes
3answers
174 views

How could hydraulic disc brakes make sense on MTBs and gravel bikes?

This How To Clean Hydraulic Brake Pistons video (Park Tool's Tech Tuesday #104) shows how dust particles can interfere with the proper functioning of hydraulic pistons. Disc brakes have been adopted ...
4
votes
1answer
173 views

Brake pads keep getting contaminated - how to diagnose?

My bike uses Shimano hydraulic disc brakes. I can't find any markings on the calipers or handles, but the manufacturer's website says they're BR-M315. Over the past few months I've had issues with the ...
0
votes
0answers
37 views

Leaking on hydraulic brake caliper piston

So, it happened after I got a pretty short ride on my bike, it is about 80km. Then I initially noticed losing braking power on my rear brake, I'm using a budget hydraulic brake (clarks clout 1) and ...
12
votes
1answer
573 views

How do I rebuild Shimano XTR brake levers?

My right brake lever (Shimano BL-M9020 to be specific) has attracted some dirt around the blade pivot area, and some parts look shiny. I suspect the master piston seals are starting to leak. Replacing ...
3
votes
3answers
200 views

How hard is it to get hydraulic disc brakes “tuned” well?

A few days ago my rear (disc, hydraulic) brake started feeling a bit funny, then “went” completely. I took it to the shop where it’d just been serviced a week earlier and they said I must’ve got a ...
1
vote
1answer
71 views

Shimano Hydraulic Disc Brake Leaking Oil

I have a Shimano 105 BR-R7070 hydraulic disc brake and just discovered that the front caliper is leaking oil from one side of the pistons. I'm wondering if this is fixable? If not, what replacement ...
3
votes
3answers
603 views

Wax or ceramic coat disk brake caliper?

I am currently in the process of building a new road bike and I want to preserve the nice look of my new hydraulic Shimano Ultegra brake calipers. Normally I'd just coat the the area I want to ...
1
vote
1answer
71 views

My Shimano brake caliper is leaking

A couple of weeks ago, I tried to bleed for the first time my Shimano disc brake. I won't say it was easy and I'm not sure I did it perfectly but the fact it brakes better now. However, I've noticed ...
1
vote
1answer
55 views

Avid Jucy 3 Piston Removal (seized)

I have a set of Avid Juicy 3 calipers that I have sucessfully replaced the pistons and seals on. Getting the pistons out of one of the calipers was not so easy though, and I ended up drilling the ...
2
votes
2answers
66 views

failed brake bleed, lever is blocked up

My brakes are Shimano Saint. I tried bleeding my brake to identify a problem and no fluid went through. I took the brake lever off separately and pushed water through it, still blocked so I gathered ...
1
vote
2answers
63 views

Bleeding brake lever impossible (sucks air)

I did the bleeding procedure for my Avid Elixir CR (hydraulic disc brakes), following the Avid service manual. While performing the last step, bleeding the lever, it seems that air was sucked in from ...
1
vote
1answer
138 views

Brake lever suddenly lost its extra movement (extremely stiff). before the pads contact the Disk

a month back i had a crash where the brake lever got a clump of sand on it, so i washed it out with water and didn't have any problems, then one random day when i took my bike out for a ride i noticed ...
11
votes
1answer
227 views

Ultegra ST-R8020 Lever: crack near brake hose interface

I have a bike with a left ST-R8020 hydraulic disc Ultegra lever, and I just noticed a large radial crack on a what seems to be part of the brake connection path (see picture). The crack seems to ...
3
votes
1answer
80 views

Do I need to keep hydraulic master cylinder right way up?

I want to swap the handlebars for a different pair. I have hydraulic brakes. When i remove the master cylinders from the old handlebars is it necessary to keep them upright, or keep them above the ...
3
votes
1answer
76 views

Hydro brake piston fluid volume Shimano vs. Campy vs. TRP

I am trying to mount some Hope calipers to some custom brake levers. Hope say the calipers - RX4+ - can be used safely with Shimano and Campy levers in their mineral oil form. I want to know if the ...
1
vote
1answer
52 views

Brake (Formula T1S) extremely sticky for no reason

The video shows Formula T1S rear brake was last maintained/bled 6 months ago, on a 2015 mountain bike which I rode last 1 month ago: the brake functioned normally then (OK, it had a very slight rub). ...
0
votes
2answers
210 views

Disc Brakes Explained

I have recently have purchased my first ever bike with disc brakes, I wanted to know the basics, the dos and don'ts, and to understand stuff I hear like contaminating disc brakes, what does this, how ...
2
votes
1answer
101 views

My Hydraulic Brakes Always Need To Be Pumped/Burped Before Braking Sharply

So my mechanic and I bled my brakes after it always needing to be pumped before it brakes, brake fluid came out black and seemed to have metal shavings at the bottom. The only problem now is weirdly ...
7
votes
6answers
2k views

Brake disc sometimes touching brake pad when not braking

I have a Whistle B-Race 7.1 e-bike that's about 3 months old. Recently the front disc brake has started touching the brake pads when not braking, when it does you can hear a "zing" sound. It ...
0
votes
0answers
61 views

Initial resistance / detent feeling in hydraulic brake

My brake has a up-front amount of pressure it needs before it will then engage. It feels like I'm actuating a clicky button and not a continuously moving brake. What could be causing this?
0
votes
2answers
104 views

Is it normal for a rotor to move when brakes applied (hydraulic)?

I noticed a movement of braking disc when pressing rear brake and watching on rotor. It was moving about half millimeter. Is it normal for rotor to move minimally?
0
votes
1answer
51 views

Front disc brake caliper fixing bolts size

Can anyone please tell me the bolt size required to attach a flat mount hydraulic disc brake (SRAM replacement) to a set of Boardman carbon forks please.
0
votes
1answer
122 views

Best way to use Shimano 105 on an older frame

I have a cyclocross bike built on Shimano 105 (~2018), but the frame was too big for me, so I decided to buy a smaller one on the aftermarket and just move all my existing stuff to this frame. I found ...
7
votes
4answers
722 views

Heating of hydraulic oil with hardtail electric MTB brakes

I do an ebike commute here in NZ with a steep downhill at the end of the ride at night and a longish downhill in the morning.Brakes are Shimano Hydraulic MT200, 180mm Rotors and pads were Shimano ...
3
votes
1answer
140 views

Why is my hydraulic front disc brake clicking?

I noticed that there's a mysterious click that seems to be tied to wheel rotation when riding my bike. It is barely audible when there's no traffic nearby. I initially assumed that it's a hub or the ...
7
votes
2answers
178 views

Are clear hydraulic brake lines available for sale?

Since all brake lines are not see through, the only way to determine if your brake needs a bleed is by feeling the brakes. If they are "squishy", then you need a brake bleed. I'm of the ...
0
votes
1answer
85 views

Hydraulic disc brakes transportation

I'm planning on packing my bike for transportation with both wheels off. I have SRAM Apex disc brakes on the bike. What are the risks if ever the brake leavers get squeezed during transportation ?
1
vote
1answer
103 views

How to reduce brake lever rattling sound at the pivot pin either by a fix or by replacement?

Context I have a Merida Speeder 200 with a Shimano MT-200 hydraulic brake system, which uses BL-MT200 levers. Over time these levers have developed a rattling sound. It appears to come from the lever ...
0
votes
2answers
179 views

Another flatbar to dropbar conversion noob

I am thinking of changing my Boardman HYB to a drop bar setup. Trying to avoid having to change the entire group set if I being honest as I am on a tight budget. Currently, its Shimano Acera 2x9 and ...
5
votes
2answers
385 views

Can't bed in my hydraulic brake pads

I washed my bike with Rhino Goo fast action cleaner and fairy liquid in a spray bottle mixed with water. I used a hose pump with no pressure, so no liquid will go into my bearings etc. After I washed ...
4
votes
2answers
344 views

Sticky/Not fully returning ultegra r8070 brake lever

Got this used di2 equipped bike with what seemed to be just a spongy front brake. Bleeding as per manual. Still "mushy". Emptied the line and disconnected the hose. The lever just don't ...
2
votes
2answers
639 views

Is losing power when pulling Shimano GRX lever a bleed problem?

Recently I had an accident on my bike, and my front brake 11-speed, front brake GRX 600 shifter isn’t braking well anymore. The shifter took a bit of damage in the fall. Initially it didn’t shift, ...
6
votes
2answers
505 views

Is the banjo bolt the same between the Shimano XTR and Shimano Saint rear brake caliper?

Earlier today, I went to install a brand new Shimano Saint caliper in place of an old XTR that's leaking from the pistons, only to find that Shimano doesn't include the banjo bolt... Do the XTR and ...
1
vote
1answer
149 views

What's the difference between mechanical and hydraulic brake rotors?

I just bought some replacement brake rotors for my Shimano hydraulic system, the box says they are for mechanical brakes, anybody know if this should effect it??
2
votes
2answers
132 views

My hydraulic disk brake pads are rubbing too hard on the rotor after taking the wheel off

so these are Shimano saint hydraulic disk brakes and i took the wheel off the other day to clean it, put it back on, and for some reason the pads are rubbing overly hard (without actually pulling the ...
1
vote
2answers
326 views

Are there downsides to cross-top brake levers? Compatible with all mechanical-hydraulic disc brakes?

I have a Genesis Croix de Fer 20 from a few years ago with the following specs: Brakes: TRP HY-RD mechanical-hydraulic caliper w/160mm TR160 rotors Levers: Shimano Tiagra ST-4700 I would like to fit ...
2
votes
3answers
483 views

Hydraulic brake bleed fail - try again or replace?

I bled and completely replaced the fluid on a set of Tektro Orion hydraulic brakes, using Shimano mineral oil. Before bleeding, one worked a little bit, and the other didn't at all. In my impression,...
3
votes
3answers
2k views

I got a leak on my shimano 105 R7020 STI

My caliper rotor push oil back in the STI. All of the sudden mineral oil started leaking. Do you know SKU of this part? (click for larger views)
2
votes
2answers
909 views

How to clean brake pads properly to stop squeal?

I bought a new MTB recently that came with TEKTRO HD-275 hydraulic disk brakes, after two weeks it has started to squeal, then I clean both front and back pads with Isopropyl alcohol and 120 sandpaper,...
0
votes
2answers
319 views

MTB to Drop Bar Conversion [duplicate]

I currently have a cheap begginer’s MTB. A Toseek Brandon 27.5er 1x8 with hydraulic disc brakes and I came across a circular drop bar handlebar close to my original flatbar diameter. Is there a ...
4
votes
3answers
225 views

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 ...
4
votes
1answer
1k views

Why do my disc brake calipers fall out of alignment?

Every so often the Shimano 105 7020 hydraulic disc brakes on my road bike start to make a metallic grinding noise and I can feel additional resistance when riding. The culprit has always been ...
12
votes
4answers
2k views

What is this stamped metal piece that fell out of a new hydraulic shifter?

I’m finishing setting up a new bike, and right as I finished bleeding and shifting around the left shifter (r7025), this little stamped steel bit fell out. It’s about 11mm in diameter and 0.5mm thick....
1
vote
2answers
176 views

How to make my Avid Elixir 1 hydraulic brakes more firm? [duplicate]

I have a Specialized Carve Comp 2013, and the front brake is very squishy. The brake system is Avid Elixir 1 hydraulic disc brakes. I wanted to inquire if I need to buy a specific kit to firm up the ...
4
votes
1answer
1k views

Magura rim caliper and Shimano hydraulic road lever compatibility

I have a trekking bike with a slightly short reach for me. On the other hand I wish to get a drop bar bicycle. I could check on this bike that the position is good with drop bars. On this bike I have ...
2
votes
1answer
334 views

Rear brake doesn’t grip/slips through and doesn’t stop the bike sharp or at all

I cleaned my bike about a month ago and since then I tried to fix both of my brakes. I have hydraulic disk brakes (Tektro Auriga). After I replaced my pads, I was bedding them for over three days of ...
0
votes
2answers
170 views

Can I change my hub so I can put disc brakes on the bike

So I have this 2007 Janis XC bike and I’m turning it into a trail bike on a budget. I wanted to know if I could change the hub on the wheel instead of buying a new wheel set so I can install some disc ...
2
votes
1answer
158 views

Formula T1S disc brake rub

I have Formula T1S disc brakes (2014 or 2013 model). One day when it was quite hot (in the 30s), but otherwise on a very mild ride on bike paths with kids, the brake started rubbing constantly by ...
0
votes
2answers
191 views

How to fix contaminated brake pads? [duplicate]

I recently spilled some brake oil on my brake pads and now they barely work, and they squeak (which I believe is normal for contaminated pads.)
-1
votes
3answers
231 views

Big vibration with Tektro Auriga brakes

About a year ago I swapped the v-brakes with a Tektro Auriga kit. I immediately made a mistake by not properly bedding in rotors and pads, doing "powerful" brakes, sudden stopping of the ...

1
2 3 4 5
7