Questions tagged [brakes]

Disc/rim/drum/coaster brakes; braking technique, maintaining brakes, anything else about stopping a bike.

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3answers
1k views

mounting disk brake caliper problem: wheel doesn't spin freely, rubs outside pad, and caliper already as far to outside as possible

Problem: I can't mount the caliper in such a way that the wheel spins perfectly freely (There's always a slight rub). When the brake engages, the rotor bends slightly (because the caliper isn't ...
0
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3answers
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 ...
7
votes
5answers
13k views

Dealing with very juddery cantilever brakes

I'm a commuter with a ~13m daily round-trip. I've been riding this on an MTB for 8 years, but I'm looking to upgrade. I recently tried out a 2012 model Specialized Tricross; this having been ...
3
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3answers
517 views

Fitting Matchmaker X to SRAM Guide T brakes?

I've got a prebuilt MTB that came with an SRAM NX drivetrain and Guide T brakes and I'm looking at upgrading the drivetrain to higher end parts. I'm thinking about taking the upgrade opportunity to ...
4
votes
4answers
469 views

Commuting and recreation scooter with handlebar brake lever

I am looking for a commuting / recreation scooter but have no experience of using one. I am very familiar with riding a bike and using handlebar-mounted brake levers. My budget is sub-£100 (GBP) and ...
3
votes
6answers
883 views

Adjust brakes to avoid deflating tire for removal

Is there a way to adjust the front brakes on my Specialized bicycle so I don't have to deflate the tire to remove it? The bike has a side-pull brake with a lever that provides extra space between the ...
3
votes
1answer
191 views

Cantilever brake is missing its mounting screws and washers, how do I replace them?

Context I am fixing up a BSO where the rear cantilever brake is missing. I want to keep this project green and cheap, and there is a good supply of used cantilever brakes online. But they often come ...
3
votes
3answers
176 views

Warped rotor due to overheating only on "expensive" brakes?

I got a new bike (Scott Egeniues 920) and after a few rides the rear rotor bent/warped due to long downhill riding (I often go down more than 1400m/4200 feet in one go). When the rotor cooled down, it ...
7
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4answers
13k views

Brake Cable Ends - Barrel and Pear Nipples

I can easily find images of these different nipples on Google, and as far as I can tell pear nipples are used on road bikes (in general) and barrel nipples are used on MTBs (in general). Barrel ...
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3answers
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 ...
10
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1answer
708 views

Cooling down brakes and rims

I recently rode my bike on some steep hills. After descending on a 4 km road with some sections at 21% slope, I realized my rims were pretty hot not only where the brake pads operate, but even up to ...
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2answers
104 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?
4
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3answers
70k views

Brakes won't release after being applied?

My son recently received a second hand bike with both hand and pedal (?) brakes. He had been using the pedal brake because the hand brakes for both the front and rear were too loose to work well. ...
2
votes
1answer
123 views

Why do my side pull caliper brakes work better with linear pull levers

I have an older Windsor bike that came with some long arm side pull caliper brakes. I was using it with a pair of avid fr-5 brake levers that are stated on the specs as "Compatible - All levers ...
18
votes
2answers
5k views

On a long smooth descent, do brakes really heat less with intermittent hard braking compared to dragging?

It is my impression (both from experience and from online opinions) that braking on a mountain bike is to be done in intermittent hard engagement of one or both brakes. The reasoning being that ...
1
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1answer
55 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 ...
1
vote
1answer
967 views

Mafac Racer Brake Replacement

I am getting tired of my Mafac Racers on my old Peugeot UO-8 and am looking for a modern side pull style brake upgrade. Are there any brakes that are good conversions to replace Mafacs? Anything I ...
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0answers
46 views

managed to take lever apart, other then the pistons, because of retaining plastic piece

I have managed to take lever apart, other then the pistons, because of a retaining plastic piece, this would be removable, but is held onto the external part of the lever by a small needle sized ...
2
votes
1answer
96 views

How to create resistance in brake lever for v Brake

When I depress my front brake lever it just goes all the way to the handle bars offering no resistance and the brake pads apply little pressure to the rims Why is this and how do I fix my vbrake. ?
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2answers
33 views

PROMAX DECIPHER hydraulic brake hose replacement

I have a set of PROMAX Decipher hydraulic brakes and need to replace the hose cable (basically adapt these brakes to another bike and the cables length is longer). I would like to know how to split ...
3
votes
1answer
139 views

Atomized bubbles while following Park process to bleed Magura MT5

I have the Park tool mineral oil bleeding kit (BKM-1), and followed their instructions for bleeding my MT5 calipers. I ended up with soft/useless brake caliper. I think maybe I introduced air into ...
1
vote
1answer
104 views

V-Brakes squeal very loud when braking

I've been having this issue for about 3 months. The front V-Brakes squeal extremely loud when i fully engage them. This problem randomly started one day when i took my bike for a ride. At first it ...
4
votes
3answers
311 views

How much better are ceramic rims at wicking away water

I assume the best advantage to rims with ceramic coatings would be the ability to shed water easier due to their relative flatness. How much better are they? Does it make that much of a difference ...
4
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1answer
138 views

Can I fit a front rim brake to Vanmoof VM3?

I have a Vanmoof VM3 bike that has a coaster rear brake and I want to add a rim brake. What size should I get or do you know one that is compatible to this bike?
2
votes
2answers
65 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 ...
2
votes
4answers
94 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. ...
3
votes
1answer
2k views

RIm brakes squealing in wet conditions

I have rim brakes on my fairly new bike which I ride to work every day. An issue I have with this bike is that the front rim brake starts squealing as soon as the conditions are slightly wet. There is ...
0
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2answers
66 views

Disc rotor rubbing against pad when bike is tilted

There is a fair amount of lateral movement of the rotor between the pads in the rear wheel break calipers. I have played about trying to centre the rotor as best as I can to stop the ching noise ...
0
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1answer
335 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 ...
1
vote
0answers
104 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 ...
1
vote
1answer
126 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 ...
2
votes
2answers
53 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 ...
0
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1answer
101 views

What is the Mechanical advantage provided by mechanical disc brake caliper

I'm designing a tricycle and I wish to put mechanical disc brake calipers but I only got leverage of brake lever, I'm also searching mechanical advantage/leverage provided by mechanical brake caliper ...
11
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7answers
8k views

Can a bike have both rim and disc brakes?

Was just wondering if a dual option like this was possible or even desirable.
4
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4answers
11k views

New brake pads, very slow to stop

I just bought some new brake pads for my caliper brakes on a bike I am fixing up and when I apply the brake, it takes at least 10 feet to stop no matter how hard I apply them; basically I can't get ...
2
votes
1answer
96 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 ...
4
votes
1answer
154 views

Readjusting brakes after every wheel removal?

Today I had a puncture and had to remove the back wheel of my bike (the wheel has a quick release skewer). After re-inserting the wheel, the rim is grinding at one side of the brake (the brake is a &...
13
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3answers
4k views

Brakes not stopping my bike

I am new to cycling. I just brought a new single speed fixie, Takara Sugiyama. It's for commuting (commute include hills). When I went down a hill, the rim brakes couldn't stop the bike at all. It was ...
1
vote
4answers
2k views

Shimano BR-RS505 brake caliper retainer screw stuck

My bike has a set of Shimano BR-RS505 hydraulic brakes and the rear pad axle, datasheet item 10, just won't budge. The flathead screw stripped a little when I tried to release it and I didn't go any ...
3
votes
1answer
465 views

What kind of brakes are these?

I had my (Giants) bike shipped overseas and the company who shipped it took the back wheel off, and disconnected the brakes on the front. I’m trying to figure out what kind of brakes they are so I can ...
7
votes
2answers
160 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 ...
3
votes
1answer
480 views

Is thru axle with rim brake okay?

so I have converted my disc brake Road Bike to rim brake. My road bike frame is thru axle but it has a slot for rim brake so i decided to go for rim brake and I removed the rotors from the hub and ...
0
votes
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?
0
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2answers
138 views

V-brake arms too far apart

I ordered a bicycle, it came with a front wheel detached. I took the v-brake noodle out to loosen the v-brake arms to let the wheel through. However, I cannot get the v-brakes aligned properly. The ...
4
votes
1answer
59 views

M8000 lever blade fit a m785 lever?

I bent my lever blade on a m785 lever and was wondering if a m8000 lever blade would fit as I can find one of them but not a m785 lever blade. The reason im asking is because the m785 blade says "...
4
votes
2answers
514 views

Brake levers don't fit the handlebars

Based on this previous question I found out that this frame can actually support V brakes and that I had to change the levers to a specific V-brake lever type. I bought some V brake levers, but they ...
2
votes
2answers
476 views

Can we put V brakes on a frame that had cantilever?

I'm trying to "upgrade" a frame that came originally with cantilever to V brakes. I'm finding really difficult to make it work (as in: when pulling the lever the pads go over to one side and ...
5
votes
2answers
361 views

Scratches on brake lever

I recently had a crash and gained a few scratches on my brake lever (see photo) How can I remove these scratches as they look bad and I can feel on my fingers when I ride. Thanks
0
votes
0answers
80 views

My shimano ultegra quick release is not working because the ball bearing inside got lost, can someone help me to identify the size of it?

Can someone help me because my ultegra caliper quick release system is not working because the ball bearing inside got lost (see picture below)
0
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2answers
73 views

Rim Brake opening

I have rim brakes and when I want to take my wheels out I undo the release lever to allow more clearance for tire, but yet the tire still squeezes through the brake pads and then is very hard to put ...

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