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

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4
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3answers
2k views

How do I get my hydraulic disc brakes working well again

I just bought a new bike (my first brand new one ever) a few months ago and a while ago I decided to give it a wash and after that my front hydraulic brake hasn't been working as strong as it used ...
0
votes
1answer
87 views

Want a snappy scrambler for stumptown

I live in Portland, Oregon and I need a bike to ride to work. It's about five miles, with one steep but not long hill. I used to have a track bike with a freewheel that was really nice for Salem, ...
1
vote
2answers
75 views

Front wheel compatibility

I have a pretty cheap bike (29" Genesis Two-Nine) which served me very well for 2 years and now the front wheel got stolen. Are front wheels universally replaceable and if yes, what are properties ...
1
vote
1answer
53 views

Do Shimano disc brakes need post mount spacers?

I am switching my rear Avid Elixir brake for a Shimano XT one, but I am a bit unsure about mounting the caliper. The Avid brakes had spacers that put the brakes in the right position for the 160 mm ...
1
vote
3answers
118 views

Hydraulic disc brakes - total friction as a function of rotor size

I have a hydraulic disc road bike with a 160mm rotor on the front and a 140mm on the rear. The setup is exactly the same front to rear, except for rotor size. I'd like to know the disparity between ...
7
votes
4answers
17k views

How long should MTB disc brake pads last?

I'm fairly new to mountain biking and I was able to put in around 900 miles on my first set of brake pads on my Giant Anthem X2. At that point they started grinding metal on metal. I went and bought ...
0
votes
4answers
98 views

Are rusty disc brake pads a worry?

I'm the fool who didn't wash the snow off his bike - it's a rusty mess. I've just taken apart the front disc brake as it was rubbing. I think that was more to do with the disc being bent, but as I ...
8
votes
1answer
146 views

What does this piece do that came with my disc brake?

I recently ordered hydraulic Shimano disc brakes with rotors and they came with a bunch of hardware, including this piece: It looks like it would fit under the screws that secure the rotor to the ...
0
votes
2answers
323 views

Front disc brake noise only at high speed

At a high speed (about 50km/h, but not sure exactly, as I don't have a speedometer) the disc starting to noise like it is touching the caliper/pad. At low speeds It doesn't noise and it's rotating ...
11
votes
8answers
10k views

Why do my disc brakes squeal when wet?

Picture the scene... It's just been raining and you are getting ready to commute home after work, you cycle out on to the tarmac, the scent of fresh rain on hot tarmac fills your nostrils, you notice ...
0
votes
5answers
88 views

Persistent front wheel squealing: Replace the fork? Switch to disk?

I have a Cannondale touring bike from the early 2000s that I use as my daily commuter. With the stock cantilever brakes and original front wheel, I had a lot of front brake squealing. I did the ...
2
votes
3answers
12k views

How to adjust Avid Elixir 1 hydraulic disc brakes?

I have a Trek X-Caliber and the rear disc is rubbing a little. So I want to adjust the brakes so it doesn't rub and make things a bit easier of course. I see many videos about brake adjustment but ...
2
votes
1answer
107 views

How to remove existing fluid before bleeding disk brake

I've found lots of tutorials on how to bleed the disk brakes. And in all of them there is nothing about removing existing fluid. I'm quite afraid that when I start to bleed brakes the existing fluid ...
2
votes
2answers
154 views

What are the negative consequences of not bedding in disc brakes?

It's common knowledge that disc brakes need to be bedded in. But I've never heard or found a description of what happens if you don't bed them in. Given the number of BSO's that now have disc brakes, ...
2
votes
4answers
477 views

Can I install caliper or cantilever brakes on a frame and set of wheels designed for disc brakes?

I have a 2008 Giant XTC 01 that came with disc brakes. Those brakes have been difficult to service throughout my time with the bike, now the pads on the back are worn out the fluid lines on the front ...
1
vote
1answer
69 views

Disk brake wheels - multiple wheelsets

I have a cx bike with disk brakes. I bought a second set of wheels to run road tyres while not off road. On my road bike there's always a minor adjustment to make to the brakes when changing ...
5
votes
5answers
933 views

Disc brakes better for rainy days?

Are disc brakes more effective on rainy weather? I had a close call riding my road bike during a morning rain and almost collided with a parked car. My road bike is steel and has tektro branded ...
-1
votes
1answer
210 views

My back brakes don't lock the wheel (skid): feature or a bug?

When I apply rear brakes only (I know this isn't the proper way to stop), it slows me down but never locks the wheel to the point of skidding (on dry pavement anyway). This is a new 'cyclocross' style ...
2
votes
1answer
76 views

What are the 'parts' to a mechanical disc brake set?

So there are rotors, pads, brake lever, brake cable...I just want to make sure that if i buy brakes I can get all the parts and I'm not missing anything.
2
votes
3answers
306 views

Is it safe to mount fender stays and disc brakes on the same bolt?

I bought these fenders recently: The rear fender works fine — there are enough mount points to support my brake, kickstand, rack, and fender. But when the salesperson sold me the fenders, we ...
8
votes
3answers
1k views

Disk brake squealing after bike shop changed my pads. Is it enough reason to ask them to re-service (for free)?

I recently took my bike to the shop, since it started making a weird metal on metal (not squeal, just hard brushing sound). After checking it out the saw that the back brake pads where really (REALLY) ...
1
vote
1answer
209 views

Can I swap Semi-Metallic brake pads for Sintered Metal Brake Pads?

I'm running disc brakes on my cyclocross bike with semi-metallic brake pads. I find that I'm constantly having to keep my rotors cleaned off to ensure optimal performance. I'm used to my mountain ...
5
votes
2answers
155 views

Disc brake maintenance

For some days now I am observing the decreasing performance of my disc brakes on my MTB. Additionally, braking is extremely loud (squeaking). I don't think I have oil or fatty substances on the discs. ...
0
votes
0answers
52 views

Disc brake lines quite long [duplicate]

Currently building a new mountain bike. I'm fairly bike savvy and have built quite a few bikes over the years, but mainly road bikes. I have installed/fitted a new Shimano slx group set and the ...
0
votes
1answer
61 views

Hayes HFX 9 lever reach and return issues

Still using the HFX 9 - think they're pretty solid. Won't win any beauty contests for sure but they'll stop you dead when you need 'em. Recently noticed that the right hand lever (rear brakes) had ...
3
votes
1answer
422 views

Disc brake pad and rotor compatibility

The SM-RT53 rotor should be used together with resin pads. If it is used with metal pads, the pads will wear out very rapidly. from Shimano BR M-416 disc brake manual How do I know if a rotor ...
1
vote
1answer
2k views

Adding disc brake to a bike without rear disc brake mounts

I'm seeking advice on how to install disc brakes on a bike that does not have rear disc brake mounts. The bike I have is the Trek 7.1 FX. Does the Trek 7.1 FX have the mount for installing disc ...
0
votes
2answers
106 views

Cross bike brakes

I am looking at cross bikes to keep me cycling through the winter. http://www.nicholsons-cycles.co.uk/product/focus-bikes-mares-cx-3-0-disc-105/49669 I like this but am worried about the brakes - I ...
3
votes
4answers
1k views

Buying first hybrid bike; better to put $ into components or disc brakes?

I'm looking to replace my 2008 comfort cruiser with a fitness style hybrid. My budget allows for maxing out at $500 (on the new fitness hybrid bike itself). I ride rails-to-trails with the kids, ...
3
votes
2answers
277 views

What to do when there's no more adjustment room on disc brakes

I just built up a new frame and discovered that, due to slightly different geometry the rear disc caliper can't be adjusted so that it doesn't rub. Basically I've got them all the way over to one side ...
71
votes
13answers
13k views

Why don't road bikes have disc brakes?

Window shopping for road bikes, can't see many that have disc brakes, any reason for this?
2
votes
2answers
458 views

How do I mount this Topeak rack onto this road bike with disc brakes?

I've browsed several closely related questions already, but haven't found one quite like my issue yet. I have the following rack, a Topeak Tourist for Disc Brake bikes (with a matching Topeak trunk ...
9
votes
3answers
5k views

What is the benefit of a larger disc rotor?

What real benefit does having a larger rotor give to braking performance? Additionally is my assumption correct that you callipers don't actually change in size, just the rotor and the adapter need ...
4
votes
1answer
249 views

Fixing hydraulic disk brakes, what to check first?

I have a 10-year old bike, fitted with hydraulic disk brakes. The bike has been actively used for around 4 years only though. Recently, my brake levers started to have more and more "play" before the ...
5
votes
3answers
2k views

Can I run rim brakes on a disc rim?

I'm trying to buy a front wheel which will work with both disc and rim brakes so that I can use it on my cross bike (with rim brakes) and my mountain bike (with disc brakes) with a dynamo hub to power ...
3
votes
2answers
830 views

Can disc brakes be considered safe for road group rides?

I know aero bars are considered unsafe for peloton, does this extend to disc brakes whose rotors can be hot and sharp? I'm not talking about races, just casual training rides: is it reasonably safe ...
1
vote
2answers
141 views

Adjusting disk brake positions

I recently got a new bike (below). It's rather latest technology for me. I got it assembled from a supermarket, but had to do almost all the adjustments myself. I don't know what I did wrong with ...
2
votes
1answer
177 views

Is it a good idea to sand off the rotor when exchanging disc brake pads?

During operation, disc brake pads cut grooves into the rotor. When replacing the pads with new ones, would it be a good idea to smoothen the rotor with sandpaper(e.g. grit 200 then grit 800)? What is ...
4
votes
1answer
598 views

What do I have to know, to replace my hydraulic disc brakes with new ones?

I want to buy a new hydraulic disc brake for my old mountain bike, which already has a disc brake. As I am very far away from any bicycle shop I want to buy the parts on the internet. The shipping ...
1
vote
4answers
216 views

Do these pads look contaminated?

These are the front brake pads of my bike. Lately I've seen a decrease in stopping force and some shudder when braking at low and very low speeds. I took them apart and they look like this: Do ...
10
votes
4answers
3k views

What causes my front wheel to twist when I apply the brake?

I have a 2005 Specialized HardRock Sport with disc brakes. When I'm slowing down from a reasonable speed with the front brake, I noticed that the top of the front wheel appears to deflect sideways ...
0
votes
1answer
1k views

Are there any suitable alternatives to alcohol/brake cleaner for cleaning brake rotors?

Alcohol and brake cleaner seems to be the recommended options for cleaning disc brake rotors. I don't have any of that available currently, so are there any suiltable alternatives to them that can be ...
36
votes
13answers
26k views

What is the practical advantage of disk brakes over rim brakes?

Disk brakes are becomming more popular on bikes now, and I was just wondering what the advantage is of this type of brake over the older rim brakes.
10
votes
2answers
1k views

Disc Brakes: Resurface your Pads?

Is resurfacing the brake pads in disc brakes (hydraulic or mechanical) necessary? If so, what would you use to do this - medium sandpaper? I spoke to one mechanic while shopping for a bike, who ...
12
votes
3answers
7k views

Why are single-speed bikes with disc brakes hard to find?

I've been looking around for bikes (decent frame & components), and find that hybrids do have disc brakes (hydraulic), but are never single-speed. While single-speed bikes typically have ...
3
votes
2answers
1k views

Should rotors have no rub at all?

I just installed a new front disk brake and the rotor rubs a bit once per rotation. If I take the rotor off and place it on flat surface, it seems totally flat but once installed I can see/hear it ...
0
votes
1answer
3k views

How do I fix sticking/tight hydraulic brake calipers?

I took my wheel off my front forks to repair a puncture. I had the bike upside down when I removed the wheel. When I came to replace the wheel back into the fork slots, the hydraulic disk calipers ...
2
votes
2answers
5k views

Disc brakes make noise

My disc-brakes on my mountain bike sing/scream when I brake. I have tried to clean them, but it didn't work. Should I replace the disks or the brake pads? Is there a better (cheaper) way to fix this.
0
votes
1answer
2k 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 ...
8
votes
4answers
9k views

Disc brakes squeak on Trek mountain bike

I have a Trek 3900 mountain bike with disc brakes, and I just took it out of winter storage to start riding it for the season. Everything works well, except for one very annoying problem: when I stop ...