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

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0answers
16 views

Does 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
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3answers
92 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 ...
0
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4answers
95 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
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1answer
138 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
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5answers
86 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
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1answer
105 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
146 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
451 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
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1answer
67 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
916 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 ...
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1answer
198 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
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1answer
75 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
289 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 ...
0
votes
2answers
312 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 ...
0
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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
2answers
105 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, ...
2
votes
2answers
422 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 ...
1
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2answers
140 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 ...
3
votes
2answers
822 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 ...
2
votes
1answer
169 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
2answers
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 ...
4
votes
1answer
571 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 ...
5
votes
2answers
152 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. ...
1
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4answers
215 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 ...
0
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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 ...
4
votes
1answer
238 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 ...
0
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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
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 ...
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) ...
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 ...
5
votes
2answers
516 views

Disc brake producing noise after a crash

After little crash I'm hearing strange knife-like sounds from my disk brakes, but the wheel and brakes doesn't look damaged. What should I do?
1
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1answer
453 views

Adapt V-brakes bicycle to disk brakes

I've been thinking in changing my v-brakes to disc brakes. Now that my rear v-break can't brake anymore I think that it is time change it. I've already seen this article. My frame is prepared for disc ...
4
votes
3answers
154 views

How to buy replacement disc brakes

In looking at replacing my disc brake rotors, and looking online I see there are different sizes available (between 180 and 203 mm). My question is, what dimension do I measure on my existing rotor? ...
3
votes
2answers
274 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 ...
3
votes
2answers
1k views

Buying brake levers, how do I find the correct ones for my bike?

I took a hard spill the other day on my mountain bike and snapped my left hand brake lever in to pieces. The ones that snapped are stock alloy rubbish that came with a Specialized Hardrock 2010 Disc ...
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.
1
vote
3answers
421 views

Rear Rack for Cannondale Trail 6 with Disc brakes

I was having a real trouble finding a suitable rear rack for my bike, a Cannondale Trail 6, with disc brakes. My usual bike use is to the office (bag containing laptop, lunch, rain jacket, etc. with ...
1
vote
1answer
206 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 ...
9
votes
3answers
1k views

Is it possible to mount a disk brake hub to a rim-brake rim?

Suppose I have a disk-compatible hub and frame, but want build a wheel based around a very specific touring rim, which is labelled as being for rim brakes. My understanding is that you cannot attach ...
0
votes
0answers
53 views

Disc brakes vibrating, “singing” under the rain [duplicate]

I recently replaced my hubs, and not-so-recently the front brake rotor. In dry conditions, everything works fine, brakes well and makes almost no noise. In rainy conditions, however, the front disk ...
8
votes
2answers
621 views

When Should I replace the rotors on disk brakes?

I've probably done about 20k on the rotors I bought the bike with. They still work fine, but are visibly worn and slightly grooved from me not replacing the pads soon enough a few times. How do I ...
3
votes
2answers
2k views

Will any Avid brake bleed kit work with my Promax brakes?

I need to replenish the fluid in my front brake on my Whyte Portobello (Promax Hornet disk brake) after all of the fluid leaked out through my own mistake. I'm looking at kits like this on eBay, ...
2
votes
1answer
284 views

Uneven Disc Brake performance

I'm using Hayes CX-5 Mechanical Disc brakes with Avid The G2 CleanSweep Rotors on my cross bike. I believe the Pads that come stock with Hayes CX-5 brakes are semi-metallic. I'm experiening uneven ...
6
votes
2answers
2k views

What's the deal with compressionless brake cable housing?

Ok folks, I'm confused and in need of advice. On my commuter (touring) bike, I just upgraded my BB5's to BB7's. In the process, decided/realized that I also need to replace my cables and housing ...
6
votes
2answers
2k views

Disc brake break-in?

Just got a bike with discs (BB7). The feel of the braking is so-so on the first ride (5km commute from LBS to home). I think the cable for the rear needs a little tightening. But even so, I don't ...
2
votes
2answers
701 views

What is the minimum tire width for a 18 mm disc rim?

I have a Croix de Fer cross bike that I purchased for touring with luggage; for commuting to work, lighter touring and some mild offroad riding. While it is nowhere stated officially, I can see on ...
4
votes
1answer
6k views

What is the difference between different types of disc brake pads

I've seen several different descriptors for disc brake pads: Metallic, Semi-Metallic, and Organic. What is the difference between these types of disc brake pads?
2
votes
2answers
2k views

Grinding sound on new disc brakes

I have a new bike, probably a month old, which has Hayes cx 5 disc brakes. I've noticed that the front brake pad is making a grinding sound when I brake at low to moderate speeds. What could be ...
2
votes
4answers
787 views

Disk brake brakes work poorly after annual maintainance

The disk brakes practically don't brake anymore. If I pull the brake lever as hard as I can, the wheel still turns if I push the bike forward. Is this normal? Do they need a "brake in" period? ...