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
53 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 ...
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2answers
61 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 ...
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2answers
52 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 ...
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0answers
313 views

Disc brake makes scratch noise when wet

I bought a TREK FX SPORT 5 a couple of weeks ago and I've ridden it like 200km without any problems. Today was the first time I biked when it was raining and I noticed after like 100 meter that there ...
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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 ...
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4answers
4k views

Front disc brake rattling noise

I recently purchased a brand new Scott Genius 950 at a local bike store. After bedding in the brakes, I noticed a rattling noise while riding coming from the front disc brake. I brought it back to ...
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1answer
105 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
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1answer
160 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 ...
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4answers
533 views

Is this bike suitable for a male

Is this bike suitable for men?
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1answer
50 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). ...
3
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1answer
76 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 ...
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1answer
61 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 ...
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3answers
1k 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)
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2answers
207 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 ...
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1answer
91 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 ...
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4answers
97k views

Hydraulic Disk brake piston not fully retracting

My front disk brake's piston doesn't fully retract. While I can ride the bike, the brake is slightly rubbing. (IE, if I just spin the wheel with my hand, it'll go around about one and a half times ...
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2answers
158 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 ...
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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?
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2answers
175 views

Hydraulic Disc Brake Pad Replacement

I have AVID Juicy Brake pads, the time has come to replace the front pads. The old pads are very worn. The new ones have lots of "pad" compared to the old ones, of course. I've tried to install the ...
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1answer
44 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.
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2answers
100 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?
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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
112 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
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5answers
2k views

I am putting drop bars on one of my MTB Shimano 10 speed 1x Deore. I am looking for a road hydro shift lever

I will be putting road drop bars on one of my mtb's for this coming winter as a project that has Shimano 10 speed 1x Deore. My goal is to "simply"🙈😆 have road shift levers and hydraulic ...
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1answer
135 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 ...
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3answers
20k views

How can I fix brake pads being too tight even after pushing the pistons back in?

I just got delivery of a road bike with SRAM Red disc brakes. It was delivered with little inserts in the brake pads to prevent accidental squeezing of the lever when the rotor was not in. When I put ...
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3answers
3k views

Disk brake has never worked properly from new, pads replaced - still rubbish!

I've got Shimano hydraulic disc brakes and ever since I've had the bike (from new) the front brake has never worked properly. It used to squeak really loudly and perform badly but I assumed they just ...
7
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4answers
710 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 ...
4
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1answer
849 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 ...
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1answer
84 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 ?
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2answers
257 views

Creaky hydraulic disc brakes on MTB

I am having some trouble with my Boardman Mht 8.8. Whenever I press my brakes while stationary, and move the bike with them engaged, a creak and clunk sounding noise appears, every time. This ...
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1answer
91 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 ...
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4answers
2k views

Bleed port repair on Shimano road brake lever?

I noticed that a small amount of mineral oil had leaked from the bleed port on my Shimano road brake lever. I inspected the bleed port screw and saw that it was loose. The threads on the lever ...
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2answers
264 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 ...
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2answers
169 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 ...
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2answers
374 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 ...
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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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2answers
117 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 ...
2
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1answer
495 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, ...
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2answers
393 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 ...
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2answers
2k views

Disc brake rotor scraping against mounting bracket

(My question is related to Rear disc brake rotor rubbing against caliper frame mount? but I hope to provide some more context & photos.) I have a Rocky Mountain Edge mountain bike (possibly 2011 ...
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1answer
143 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??
15
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6answers
40k views

How do I prevent my hydraulic brakes from getting pressed/damaged when the wheels are off?

When I was buying my bike, the technician in the shop told me not to press the brakes when the wheels are off (detached), otherwise the brakes will get damaged (I don't know how). I need to detach ...
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2answers
263 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 ...
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2answers
741 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,...
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3answers
409 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,...
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3answers
23k views

Troubleshooting Hydraulic Disc Brakes

I replaced the fluid in my hydraulic disc brakes as they would not work within the first 10 minutes of cycling and would gradually sharpen up. I suspect they had air in the system. They were sharp ...
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6answers
6k views

A bike for city commute - disc brakes, bar-end shifters, tires

I'm planning on buying a bike for city commute. My commute to work is approximately 12km (7.5 miles) one way. I live in Vancouver which means: I'll be riding in rainy weather frequently. I'll be ...
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2answers
154 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 ...
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5answers
955 views

What are the typical range of maximum braking friction forces?

There are many non-bike applications which benefit from using bicycle hardware. Case in point, there is a long and rich tradition of using bike parts in aviation. One particular area of interest is ...

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