Questions tagged [disc-brake]

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

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2
votes
2answers
42 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 ...
3
votes
1answer
52 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 ...
0
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1answer
72 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 ...
4
votes
1answer
197 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 ...
17
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4answers
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 ...
9
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3answers
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 ...
10
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3answers
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 ...
3
votes
3answers
416 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 ...
1
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2answers
41 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 ...
1
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2answers
111 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....
3
votes
1answer
131 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
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2answers
155 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 ...
5
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3answers
588 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 ...
4
votes
2answers
638 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?
4
votes
3answers
74 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?
14
votes
3answers
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 ...
0
votes
1answer
212 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 ...
2
votes
2answers
204 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 ...
6
votes
2answers
344 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
130 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? ...
8
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8answers
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 ...
0
votes
1answer
54 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 ...
4
votes
4answers
869 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 ...
2
votes
1answer
144 views

Why do disc brakes stop faster in dry conditions?

I have heard that bikes with disc brakes have shorter stopping distances even in dry conditions, such as the comparison in this video: GCN - How Much Faster Can You Stop With Disc Brakes? At about 1:...
2
votes
3answers
370 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,...
0
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4answers
149 views

Replace v-brakes with disc brakes [duplicate]

I would like to know whether I can replace my old v-brakes with disc brakes. Do I need to also change the wheels or something else?
3
votes
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)
0
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1answer
78 views

Looking for a good mountain bike for my daugher. Want disc brakes and Fork lockout [closed]

My daughter is a teenager and we love going biking, either on trails or during camping trips. We are not hard core bikers, but she is ready for a bike upgrade as she is using a 20" wheel bike ...
3
votes
4answers
3k views

I mistakenly put WD40 for my disc brakes and now pads not anchoring as well as before. Any solution?

I heard it wears off after a few rides but it is still not gripping firmly. Is there any solution for this? I also saw using rubbing alcohol. Is that sufficient?
3
votes
2answers
582 views

Very narrow gap between pad and brake rotor

I have just retired my Tektro brakes (13 years of service) and replaced with a pair of cheap Shimano MT200. I have a problem with extremely narrow gap between the disk and pads. The gap is so narrow ...
0
votes
1answer
133 views

The outside diameter of the brake rotor rubs against the caliper

I have upgraded my bike with a new front suspension fork. Bought and fitted an adaptor from Shimano as the fork is laid out for 160mm (Postmount 6) and my disc front wheel brake rotor is 180mm. ...
0
votes
1answer
120 views

What features make a disc brake caliper unsuitable for use with other than resin pads

Shimano says its Tourney mechanical disc brake is "designed for resin pads only". What is it about the design of a brake caliper that makes it suitable only for resin pads?
2
votes
2answers
629 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,...
2
votes
2answers
212 views

Is a "universal" rotor compatible with all types of disc pads?

What is a "universal" disc rotor? One that is compatible with all types of brake pads?
1
vote
1answer
81 views

Do you need to open the calipers of a hydraulic disk brake in order to clean it?

I would like some advice about cleaning disk brakes. Recently when I've braked I've occasionally heard a noise as though air is being released, not a squeak or croak but it sounds like there is ...
4
votes
3answers
474 views

Replacing a lost disc brake pinch bolt

While replacing the cable for my front disc brake, I lost the bolt and plate that attaches the cable to the calliper. In this Park Tool guide, they call it a 'pinch bolt' — labelled E in the image ...
8
votes
2answers
664 views

Having one wheel set with 6 bolts rotors and one with center locks?

I'd like to purchase a second wheel set for my bike: to have one wheel set for road, and one for cross/light MTB, and swap them easily depending on the kind of ride I plan. My bike uses 6 bolts disk ...
4
votes
1answer
957 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 ...
3
votes
1answer
223 views

what does "pre-bled" mean in the context of a cable-actuated hydraulic disc brake

I am shopping for disc brakes and looking at cable-actuated ones. What would "pre-bled" mean in that context?
3
votes
2answers
314 views

mechanical disc brakes and bikes with internal cable routing

One review of TRP Spyre that I read said the brakes didn't perform well until the reviewer installed compressionless-housing brake cable. Is that the general consensus? Jagwire says their ...
2
votes
1answer
64 views

How to identify whether a TRP Spyre mechanical disc brake is the post-recall version?

For online (bargain) shoppers who face the risk of possibly buying old stock, are there any markings on the post-recall TRP Spyre that could be used to clearly identify it as the new version?
0
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0answers
104 views

What does "unisex" mean in the context of mechanical disc brakes?

I see the term "unisex" used with mechanical disc brakes. What does the term mean in that context?
2
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5answers
200 views

what features do I give up if I buy the mechanical disc brake caliper costing one fourth that of another manufacturer?

I've always had rim-brakes on my bikes but now I'm assembling a bike with a frame that has disc mounts only. What features or qualities am I sacrificing if I opt for the $40 mechanical disc brake ...
5
votes
4answers
1k views

Is it normal that front wheel bends when front disk brakes are applied?

When I apply front disk brakes I see slight bend in the rim and wheel. Is this normal or I have a low quality parts.
4
votes
1answer
768 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 ...
0
votes
2answers
2k views

Why does a Shimano centerlock rotor have free play?

I have an electric road bike that has SM-RT64 Shimano centerlock brake rotor in the front. I have noticed that when I press the front brake and try to rock the bike back and forth, there's some free ...
-1
votes
3answers
213 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
votes
1answer
85 views

What is this hardware inline with the brake cable?

The brake caliper is an Avid BB7_MTN, but there seems to be some kind of additional element inline with the brake cable. From what I can gather looking at the picture, there's an electric cable coming ...
1
vote
2answers
117 views

Brake pad too low on rotor?

I just bought a new Clarks CFR-06 rotor to try to improve my crappy Tektro Auriga, but it seems that I made another bad choice. After just a couple of minutes of trials, I noticed that the pads are ...
5
votes
2answers
912 views

Which Shimano Centerlock Rotors Work with Avid BB7 Mountain Brake Calipers?

I spent a lot of time trying to figure this out, so I thought I would post this to maybe save others the hassle. The problem: Avid BB7 Calipers don't play nice with many of the popular Shimano ...

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