Questions tagged [disc-brake]

Brakes with a disc near the hub and calipers that grip that disc.

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Does (or has in the past) an adaptor existed to mount a disc rotor to a Shimano Rollerbrake type hub?

I have acquired a Nexus 8speed rear hub. It’s a good one and I’d love to use it. However, it has been set up to use rim brakes and under the plastic cover is the interface to mount a rollerbrake. Does ...
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How do hydraulic interrupter brake levers work?

It has come to my attention that interrupter-style levers are available for hydraulic brakes now. By interrupter lever, I mean those levers which can be mounted to the same cable on an alternate ...
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13 votes
3 answers
2k views

Are brake calipers directional?

I'm interested in putting a discs brake on the right side of a bicycle. The goal is to have dual front discs, similar to how motorcycles often use double front brake discs. I can buy or make a custom ...
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2 votes
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Wheel not straight in dropouts - can this cause brake rub?

My front wheel is not straight in the fork dropouts. It's been like this since I've bought the bike second hand a few years ago. See pictures below. I've tried installing an identically sized wheel ...
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1 answer
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Shimano SM RT800 rotors on BR-RX400 brakes

I just want to make sure that I can put the Ultegra ice-tech 160mm rotors on my gravel bike that currently has BR-RX400 brakes and SM-RT70 CL rotors. On Shimano website https://productinfo.shimano.com/...
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4 votes
2 answers
639 views

How to restore broken rear disc brake mount in carbon frame?

Look at the image: Bike model is Rocky Mountain Vertex 990. The frame is broken in a way that it's impossible to install rear disc brake. Possibly there may be a frame deformation. Is it even ...
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1 vote
2 answers
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Mechanical Disk Brake Pads Too Thick

I decided to replace my front brake pads since they are worn out beyond function. So after removing the old pads, I made sure the piston was fully out, and the adjusting screw was fully tight as well, ...
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17 votes
9 answers
4k views

V-brake vs hydraulic disk-brake - which is more environmentally friendly

Let me start the question by saying that I have a pretty good impression of the advantages of disk brakes vs. V-brakes, so I'm not asking about performance comparisons. I'm MTB-ing several thousand ...
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9 votes
3 answers
2k views

How do bicycle brake manufacturers balance their products' physical limitations?

This question is valid for both mechanical and hydraulic brake systems. Premises: The human hand has a threshold value for what a comfortable level of squeezing force is, and one cannot comfortably ...
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8 votes
2 answers
228 views

What contributes to disk brake noise when wet, and how could I minimize it?

The accepted answer in Why do my disc brakes squeal when wet? states that some noise on disk brakes when wet is to be expected. However, I'm interested in factors that might affect the volume of the ...
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3 answers
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How to adjust Shimano M315 disc brakes?

I have a Cube Nature Pro (2017) bike and the brake lever for the rear brake has too much travel and braking is less effective than usual. The pads don't look too worn as there's over 1.5mm on each, so ...
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3 votes
2 answers
409 views

What Shimano microspline rear wheel hub would fit my 26in Mavic Cross ride wheels?

Title. I purchased a new Deore 1x12 groupset without realising I would need to change the rear hub to fit the new microspline Shimano introduced a couple of years ago. What would the Shimano rear ...
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3 votes
1 answer
150 views

What material is Shimano Brake Caliper Bolt?

Out of curiosity, would anyone know what material Shimano uses for Brake Caliper Mounting bolts? Would Stainless Steel 316 be sufficient in strength if I needed longer bolts? The particular bolt I am ...
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4 votes
1 answer
232 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 ...
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5 votes
3 answers
822 views

Cleaning Disc Brakes

I recently got a new mtb with hydraulic disc brakes and they also new to me and son I wanted to know about maintaining them, mainly cleaning, do I need to clean them? If so how often? When I wash my ...
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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 ...
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3 votes
3 answers
645 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 ...
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5 votes
3 answers
239 views

What model of rear brake caliper do I need?

This old beater bike is missing one part. The front rotor and caliper are there. But the rear caliper is missing. What model of rear caliper do I need? If you are able to identify the model (...
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3 answers
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Mechanical disc brake caliper round pads 23 mm diameter

I’m trying to find round brake pads of ca. 23mm diameter. They are for a Valk bike brand sold online in Australia. There is no brand or model evident on the brake caliper or levers. Almost certainly ...
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8 votes
3 answers
2k views

Removing wd40 from disk brakes

I sprayed WD40 on my disk rotor and now my rotor and pads are contaminated and now my rear brakes are practically useless.Is there any way to fix the problem without swapping out the brake pads and ...
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0 votes
2 answers
122 views

Is it worth switching from V brakes to disc brakes? [duplicate]

The bike that I am getting has v brakes and I was wondering if it would be worth the money to get disc brakes for it. Can someone please help me here?
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2 votes
2 answers
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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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1 vote
2 answers
100 views

Are these N04C pads worn out or not?

I don't know how to tell myself so need help, please. It does look like there is still metal to be used for braking, but the brakes barely grab these and instead make a squeaking sound. I have ...
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2 answers
234 views

Are road mechanical disc brakes safe to pair with a steel gravel bike

This is a follow up to this post: How to increase brake responsiveness on Microshift style STI brifters paired with mechanical disc brake I have mountain bike mechanical disc brakes on a steel gravel ...
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2 votes
4 answers
201 views

How to increase brake responsiveness on Microshift style STI brifters paired with mechanical disc brake

I have a set of microshift style STI brifters. They are paired to a generic brand mechanical brake set on a Kent Nazz gravel bike. I can't seem to get the brakes to be as responsive as I would like. ...
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4 votes
3 answers
951 views

Stripped brake mount on fork lower

I noticed that one of the bolts used to attach the brake to the fork is stripped and found many solutions but wanted to know if continued use will make it worse with and without repairing it. Also ...
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0 answers
109 views

Disk brake issues

I’m new to disc brakes and noticed my braking power decreasing. Took the pads off and they look like this. Do these lines indicate anything? What is a used disc brake pad supposed to look like? What’s ...
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2 votes
2 answers
88 views

Fixed piston on promax render r caliper doesn't adjust up or down

I have a bike setup with Promax Render R disc brake calipers. They use mechanical action to brake (no fluid). There's an active piston that's actuated by the brake lever, and a fixed piston that sits ...
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3 votes
1 answer
90 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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0 votes
1 answer
83 views

Disc brakes rub under load

Recently I started to have issues with my gravel bike, which I bought in April 2021, a Specialized Diverge Carbon Comp. The first issue happens to be a clicking / creaking of the crankset when under ...
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4 votes
1 answer
240 views

Why are disc brake calipers behind the wheel axle?

After reading this (anxiety inducing) question on a disc brake dislodging a front wheel on a brand new bike with a QR axle I wondered why the brake calipers are placed behind the axle in the first ...
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17 votes
4 answers
4k views

Accident from front wheel locking up on brand new bike

I purchased a brand new hybrid bike with mechanical disk brakes a few weeks ago I have ridden the bike for a few weeks without any issues on city streets with potholes and elevations from bridges I ...
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9 votes
3 answers
2k views

I know I am missing a rotor but I don't know what to attach it to

I got a cheap second hand bike for my son as its not worth repairing his current one as he outgrew it. At the time, I knew it needed a new inner tube which I was going to replace. Only now I noticed ...
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10 votes
3 answers
2k views

Front brake causes violent shudder

My bike is equipped with disk-brakes. It also has a fork with suspension. When I apply the front brake, my fork vibrates violently, as can be seen below: I've adjusted ...
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3 votes
3 answers
640 views

How to easily install rear disk brake wheel without service stand

I have a road bike with hydraulic disk brakes. I really struggle to install the rear wheel with the cassette and disk colliding with the frame. I spent about an hour yesterday trying to get the wheel ...
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1 vote
2 answers
66 views

mechanical disc brake replacement for Schwinn Protocol 1.0

I am fixing up an older Schwinn Protocol 1.0 for a friend and I need to replace the mechanical, post mount disc brake caliper. (I took apart the old one and it is missing a magnet and in spite of ...
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1 vote
2 answers
189 views

Disc Wheel w/ rim brake to Disc Brakes?

I have a zipp disc wheel that is for rim brakes. Is it possible to convert it to a disc brake? I’m thinking it might be possible by replacing the hub/mount for the disc brakes but I’m not sure on that....
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3 votes
1 answer
231 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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7 votes
2 answers
202 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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5 votes
3 answers
615 views

Lubricant spill on disc brake

As the title suggests, I was lubricating the gears and chain, and I accidentally dropped some of the oil on the rear brake disc. I didn't notice it then, and took the bike out for a spin. That's when ...
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4 votes
2 answers
3k views

Anyone know what a replacement Disc pads might be for Tektro HD-R290?

The brake pads say F10BS but they've been really hard to find (and unavailable on Tektro site). Does Shimano (or anyone else) offer a resin version of this brake pad as this one is metal-ceramic?
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4 votes
3 answers
89 views

Rear disk touches the caliper mount

I am putting a new caliper on and the had to get an adapter. Anybody know why it rubs and how to solve it?
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14 votes
3 answers
1k views

Can't get enough braking power after lots of adjustment

Hi :) I just bought a 2015 Specialized Diverge A1 with almost completely stock components. With some adjustments everything seems to work well except for the disc brakes. This bike has a Shimano ...
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1 vote
1 answer
428 views

Why did I lose braking power after hitting a curb?

Recently I hit a curb on my bike. I heard a cracking sound, my front disk brake (cable) felt stiff, and I could feel a lot of resistance from the front wheel. I left it alone for a few minutes, and ...
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2 votes
2 answers
276 views

Disk brake and wheel is moving: is my fork too long?

In the links I gave below, the website is in French but you can change the language. Following this thread I bought new bike components to build my own bike. In particular I bought Surly Steamroller ...
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6 votes
2 answers
762 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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2 votes
1 answer
284 views

Disc brake mount/adapter bolt length

My bike's frameset has IS mounts. The mounts are 9.6mm thick. I bought a pair of IS to post mount adapters but they don't come with bolts. The adapters are 11mm thick. How long should the bolts be? ...
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8 votes
8 answers
1k views

QR Skewer orientation

Sheldon Brown's site suggests that QR skewers should be installed with the levers on the left side of the bike, "so the derailer [sic] doesn't interfere with it" and that "Usually, the ...
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0 votes
1 answer
64 views

Looking for recommendation of disc brake to replace Formula RX

I have a relatively old hardtail MTB installed with Formula RX brake system and rotors SM-RT53 (160mm) / SM-RT53M (180mm). Now I have to replace the brake system and would like to have some advice. To ...
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4 votes
4 answers
880 views

Replacing disk brake pads with multi-tool only

During my cycling week I only had my multi-tool with me. Back home and intending to replace the brake pads, I realized that I have to use pliers if I want to unbend the end of the cotter pin without ...
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