Questions tagged [brakes]

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

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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 ...
0
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1answer
98 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 ...
2
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1answer
88 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
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1answer
139 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 ...
3
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1answer
461 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 ...
3
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1answer
459 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
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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?
4
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2answers
480 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
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2answers
465 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
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2answers
357 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
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0answers
77 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)
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2answers
118 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 ...
0
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2answers
72 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 ...
2
votes
3answers
142 views

Front brake lacks 2mm in reach. Can it be ironed out?

I have been having some trouble with my 6 years old Tektro R539 brakes, see Tektro rear brake does not stay closed and Road rim bike brakes don't open when using the release . So I am now looking ...
0
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2answers
97 views

Is it normal for a rotor to move when brakes applied (hydraulic)?

I noticed a movement of braking disc when pressing rear brake and watching on rotor. It was moving about half millimeter. Is it normal for rotor to move minimally?
1
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0answers
51 views

Tektro rear brake does not stay closed

Two weeks ago I had an issue about my brakes QR not working and asked about on this site Road rim bike brakes don't open when using the release I got some help - and I am very thankful for that - ...
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 ...
2
votes
1answer
233 views

Road rim bike brakes don't open when using the release

My Tektro R539 brakes do work on the road: they obey to the brake levers at squeezing and releasing times. They do not behave to the mechanism to open them (for wheel removal for instance), they do ...
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 ...
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 "...
0
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2answers
120 views

Drop bar ends and brakes

I've been getting more into taking my bike out on longer rides and am finding that I would really benefit from having a drop bar. My bike is an old Giant Rapid 2, it's almost entirely stock (I ...
1
vote
2answers
271 views

What fault in the steering mechanism can risk causing the rider to fly over the bars when braking?

By steering I collectively mean the area of handle bars, headtube, and fork. So last year I bought a second-hand bike. Never really had a problem with it but today I took it to the shop to change worn ...
1
vote
1answer
55 views

Where can I locate two M8 brake posts for a 1995 Cannondale Head Shock Fork

I use these brake posts on two different 80's - 90s Cannondale mountain bike to mount Shimano V-Brakes and Magura hydraulic rim brakes. The end that threads into the fork is M8. Most brake posts these ...
3
votes
1answer
184 views

Missing bolt in my brakes, how can I find a replacement?

I was braking in a downhill, the gradient was steep so I was using both brakes mostly the rear. When suddenly the rear brake shifter went totally soft. I did a full-stop using my front brake only and ...
1
vote
1answer
74 views

Front brake pads resting on wheel

I noticed this week that the pads on my front brakes are resting on the wheel and (I think) causing some undue friction as I ride. Is this normal? It seems the bracket needs to be titled, but I am ...
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 ...
0
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1answer
48 views

Looking for lightweight somewhat inexpensive flatmount brake calipers for a road bike shipped from North America [closed]

Looking for the right brake calipers. I see a lot shipped from China or those that cost $130+ for 2. I need: disc brakes cable pull or cable to hydraulic conversion as I am not switching out my ...
7
votes
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 ...
4
votes
1answer
165 views

How should exactly the brake cable be fixed to V-brake caliper?

Regarding the V-brake calipers, where the cable is tightened with a screw: Should the cable go between the head of the screw and the washer (1), or should it go between the screw head and the body of ...
7
votes
3answers
1k views

How safe is v-brake system with handbrake and coaster brake for child going downhill?

I have bought a Volare blaster 16” bike for my 5 year old son (due to arrive tomorrow), but am now a bit concerned whether I have chosen the best braking system for him. The blurb for the bike states ...
1
vote
1answer
56 views

Bicycle Trailer Hitch Design Considerations

I have been pulling a bicycle trailer with my Surly Karate Monkey for approximately 3-4 years. I have been using cheaply obtained used kiddie bike trailers, usually removing the fabric and adding a ...
3
votes
1answer
96 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 ...
0
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1answer
65 views

Correcting An Inverted Recessed Mounted Caliper Brakes On Vintage Bike Frame

It seems like the previous owner of my bike installed the rear brakes backward. I figured I could simply mount the brake on the other side. Unfortunately, this is not possible since the recessed nut ...
14
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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
124 views

I cannot insert noodle to reattach front vee brake

Removed front wheel to transport bike from 4 week stay at bike shop for tune up. At home, I cannot insert noodle to reattach bike. It's like cable is too tight. Contacted repair guy, who said I ...
0
votes
1answer
213 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 ...
4
votes
1answer
184 views

How does the new Canyon Endurace rim version support 33mm tyres with R7000 brakes?

Canyon just popped a new version of the Endurace back in stock and I'm a bit confused. Half way down the page they claim "With 33 mm of clearance, just fit chunkier all-road rubber and you’re ...
1
vote
2answers
218 views

Chemically roughening rim braking surface to improve performance

For trial bicycles there is a technique to improve braking performance by roughening the rim surface using a grinder. How-to video Apparently, this technique is not widely seen outside the trials ...
2
votes
2answers
107 views

kid's bike rear brake not having stopping power

I recently bought a 2nd hand kids bike for my 4yr old. Prev owner replaced rear wheel with one having a freewheel and installed rear brake. I've noticed the brake does not have any stopping power when ...
-1
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2answers
210 views

Is it illegal to cycle with one brake? [closed]

After refurbishing my mountain bicycle I have discovered I need a new cable for my rear brake. My front brake works perfectly fine and that is the only one I use. I will be getting the rear brake ...
8
votes
4answers
1k views

Most effective way to improve cantilever brakes

I have a Dawes Super Galaxy touring bike with cantilever brakes, and I'm a bit worried about the stopping power of the brakes when I start loading the bike up with kit to go touring. But I don't know ...
3
votes
4answers
220 views

Why dual pivot brakes, not longer brake arms?

Dual pivot brakes are marketed as having "more braking power", which in technical terms means higher mechanical advantage. Exactly the same effect can be achieved by longer brake arms (ones ...
5
votes
2answers
371 views

Can't bed in my hydraulic brake pads

I washed my bike with Rhino Goo fast action cleaner and fairy liquid in a spray bottle mixed with water. I used a hose pump with no pressure, so no liquid will go into my bearings etc. After I washed ...
6
votes
1answer
477 views

Which brake system is this

I have two brake systems I think on my bike. On the front I have a threaded stud and on the back a road brake. Here is the front and the back (click for large version): As you can see on the back the ...
2
votes
1answer
79 views

Should brake lever move if you press the (V-brake) calipers together?

The "normal" way is pretty clear: you press the brake lever, it pulls the bowden, which then forces the V-brake calipers together. However, the question is: should it work also the other way ...
3
votes
2answers
451 views

Brakes loose, cable hanging out

I used my brakes the other day and this happened (see photo). Is there any way to fix this? I’m unable to use the brakes at all with this issue.
1
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1answer
120 views

Squealing of rim brakes on a bike [duplicate]

My bike for 2 days started to squeal whenever I use my back brakes it has been really annoying and I am trying to fix it. Please give me any suggestion that can help this problem
2
votes
3answers
151 views

Change old external ultegra brake cables to under the tape brakes

Is it possible to change my old external ultegra brakes to integrated brakes ?
5
votes
3answers
520 views

Mechanical Shimano Deore Disk Brake - How to fix lack of bite/grip

I have a frustrating issue with my MTB and want to ask how I can go about actually diagnosing this issue. I have a MTB Shimano Disk brakes. These are mechanical and one pad is pushed into the rotor ...

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