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Questions tagged [brakes]

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

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7 votes
4 answers
4k views

Why is my bike clunky, and what is this loose string?

I have a black sport trail all terrain Rockrider that I bought from Walmart for around 150 dollars. All was well for a few months, until I noticed a loud clunky sound with my pedals that made it hard ...
1 vote
1 answer
2k views

SRAM Rival brake caliper screws/bolts are rusty, how to replace?

I have a full SRAM Rival groupset from 2011. Having used it in humid and rainy places for a while, most of the parts are OK, but the small button-head screws (or bolts?) in the QR pivot for the brake ...
0 votes
1 answer
337 views

Tektro HD-M275 rear brake making grinding noises while braking

I got Tektro HD-M275 hydraulic disc brakes with 180mm rotors, front brake is working perfectly with no issues. Under light braking rear brake works normally without any noises or vibrations, but as ...
0 votes
1 answer
505 views

SRAM force axs brake judder/shake/vibrate

I have problem with my SRAM force axs brakes, I bought new disc brake rotors and as well brake pads, cleaned it all changed it, but yet when I brake it just totally judders or vibrates it just doesn’t ...
8 votes
1 answer
589 views

How do hydraulic interrupter brake levers work?

It has come to my attention that interrupter-style levers are available for hydraulic brakes now. By interrupter lever, I mean those levers which can be mounted to the same cable on an alternate ...
6 votes
1 answer
173 views

Replacement for "Weinmann Symetric"

Can I replace these "Weinmann Symetric" brakes on my city bike with something modern? The rim width is ~25mm. I have only found similar brakes online for road bikes, which do not fit the rim ...
6 votes
2 answers
171 views

How to temporarily plug hydraulic brake hoses to route them through frame without leaking fluid

Is there a way to temporarily plug and seal hydraulic disc brake hoses as well as hydraulic dropper post hoses, before installing them or removing them from a frame? The idea is to keep things tidy ...
3 votes
1 answer
392 views

What's this nugget called in these tektro drop levers?

Inside of this hole there used to be a cylindrical stopper or drift that was used to set the lever pull distance. It dropped out of this on a ride at some point and I can't find it. Since I don't know ...
3 votes
1 answer
121 views

Why do brake cables come out of barrel adjuster when they are loose?

My brake cable got unattached from the pinch bolt and came loose. I then noticed that at the other end the cable housing was not inside the barrel adjuster anymore. I thought something broke at the ...
3 votes
2 answers
557 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 ...
1 vote
3 answers
1k views

My brakes rotate around after I tighten them and other v-brake questions

I recently purchased the long type of v-brake pads from Disco Brakes at Amazon. These are the ones with the tail. My original brakes were the simple shorter kind, installed as small spacer/washer/...
3 votes
3 answers
2k views

Where do I get this part for my v brake?

I lost small plastic "collar" part on the front v brake which goes around the spring and onto the post. Does anybody know where I can get another one?
0 votes
2 answers
106 views

How to upgrade Scale 930 to reduce weight and gain speed?

I need to upgrade Scott Scale 930 (2022) with the following properties: fork: FOX 32 Float Rhythm Grip 3 (100mm travel) bottom bracket: Shimano BB-MT500 / shell 41x92mm rear derailleur: Shimano XT RD-...
0 votes
0 answers
89 views

How do you put a usable brake on a bike trailer?

How are you able to brake when on a bike trailer? I am making a bike trailer and need some tips on how to make it.
2 votes
1 answer
66 views

Sram/Avid brake hose compatiblity

I have Sram Rival AXS which I want to transfer from one bike to another. Unfortunately the new bike is bigger (M -> XL) so new brake hose is required. SRAM recommends SRAM Brake Hose Kit - Double ...
3 votes
3 answers
2k views

Brompton Rear Brake Caliper Assembly Schematic

What is the list and order of components that thread onto the Brompton's rear brake assembly from the brake caliper through to the Lower Stop Disc for an M6R? At some point on a recent ride down ...
1 vote
1 answer
69 views

Brake problems (need adjustment too often)

I've been having problems with my bicycle brakes for not a short time and I've been having it with a couple different bikes. The brakes get loose after 1-2 weeks. I deliver with my bike so I use it 50-...
7 votes
1 answer
436 views

How can I keep my brakes centered?

If I move the brake device by hand, I can get it centered. However, after riding a bit I guess the bumps of the road shift it either to the right or left, causing either the right or left brake pad to ...
3 votes
1 answer
118 views

What kind of Julet cut off plug is this?

I own a NCM Moscow that uses a Tektro EL555-RT with this Julet 2pin connector I would like to replace the braking system with a hydraulic one however I simply can't find brakes with this connection, ...
3 votes
2 answers
80 views

Should front brakes have this much give?

https://photos.app.goo.gl/uQdrppNmAwJsiyHk9 I never paid attention to how much give the brakes had when the bike was new. The video shows the brakes clamped down onto the tire, and as I rock the bike ...
13 votes
7 answers
15k views

What is the equivalent for Shimano Roller Brake grease?

I'd like to regrease my roller brakes, because it started to squeak. There is dedicated Shimano Roller Brake grease available, but I'm curious what kind of grease it is really like, what it is made ...
1 vote
2 answers
51 views

Which brake levers and brake calipers to replace Sram s-series HRD700 (postmount)?

I own a Giant TCX SLR 1 from 2014, with Sram s-series HRD700 brakes (post mount right?) and 10 speed sram force transmission. Discs are 140mm rear and 160mm front. My brakes are completly gone and I ...
6 votes
0 answers
59 views

What is forward drag on a coaster brake

I have a single-gear coaster brake bicycle that needed fixing. I would have to pedal real hard to get it to go and backpedal a block in advance for bike to stop. Very spongy brakes. Well I took brake ...
0 votes
1 answer
55 views

v brake + adapter vs mini v

I am interested in Paul Components Motolite or Minimoto (or Box Components’ One offerings). I want the best rim braking performance on cantilever posts to go with my TRP RRL levers I know there’s v ...
5 votes
5 answers
414 views

Comparing hub/disk brake vs rim brake. Power, reaction, and skidding

I'm not a bike enthusiast but I've commuted quite a lot with bikes. I don't always understand the physics but believe I can extract well what happens per experience. I could be mistaken though. I've ...
4 votes
1 answer
670 views

Is this slight movement of Cantilever brake arms intentional?

There is some slight movement of my canti brake arms on the brake bosses when the lever is pulled. It's pretty minimal but I'd be interested if if this is intended and whether it might cause any ...
1 vote
1 answer
94 views

Front hydraulic brake lever dislodged

This is a brand new mountain bike for kids with hydraulic brakes. The bike fell on its side and when we picked it up, the brake handle got caught by a branch. With a little effort, we were able to ...
7 votes
3 answers
9k views

Hydraulic brake lever doesn't return after being released, dependent on weather

I have a pair of second-hand Shimano ST-RS685 hydraulic brake levers / shifters. Unbeknownst to me they hadn't been used for a year and had quite a bit of dirt / grit inside, which I've cleaned to a ...
16 votes
1 answer
3k views

Why are disc brakes (disc & caliper) always installed on the left side of the bicycle?

When reading the question Front tire and downtube are extremely close, I realized that disc brakes (referring to the assembly of brake disc and caliper, not the brake levers) are always installed on ...
4 votes
2 answers
639 views

Disc Brakes disengage when braking, why does this happen?

I have a fairly heavy e-bike and I'm a fairly heavy rider. My bike has mechanical disc brakes, and around 5 months ago I was having an issue where the brakes became useless, as in when I applied them ...
1 vote
1 answer
122 views

U-brake conversion from up pull to side pull (like bmx front brake)

I have an old steel Belgian bike from the 80s (I believe) which I am trying to restore to make it my daily commuter. I have to replace many things and every time I encounter that the bike is far away ...
1 vote
1 answer
79 views

In what order do the washers go on smooth post cantilever brakes

I have a Specialized Rockhopper that is missing the brakes. It has cantilever brakes smooth post. I have the parts but don't know what order the washers go in. Does the concave part go against the ...
0 votes
1 answer
39 views

Replacing pivot bolt on Shimano Sora caliper brakes

first time posting. I've lurked for years and have found answers to a ton of questions, but can't seem to find a discussion on one specific thing. I have a 1980s Peugeot Elan—I believe from scouring ...
2 votes
2 answers
125 views

Standard oil grease as Shimano Roller Brake grease short-term replacement

I am currently in the process of cleaning up the rear axle from dirt and excessive grease, legacy of the previous owner. I will be replacing a ball bearing and few other small components, but would ...
2 votes
1 answer
116 views

Which brake arms of Shimano XTR M900 go in front?

The Shimano XTR BR-M900 Cantilever brake arms come in two different lengths. Which go in front, the long ones with the stamped "F" or the shorter ones?
4 votes
3 answers
1k views

How to find out about my 1970's JC Penny 3 speed bicycle?

I recently got a 1970s jcpenney Lightweight 3 Speed bicycle but it doesn't have a brake on it whatsoever. I cannot find the specs or any information about this bike. Does anyone know where I could ...
6 votes
5 answers
5k views

Is there any advantage to using brakes the UK style?

For a moment forget about the current downsides of preferring UK brakes living in a non-UK marketplace: Hard to test ride bikes in stores Rental bikes won't be set up that way Some frames might not ...
3 votes
3 answers
614 views

Tektro HD-R210 Bleed Port Leak

I have a Giant Fastroad SL-1 with brakes listed as Tektro HD-R210 hydraulic disc, 140mm Recently I bled the brakes and afterward noticed that there's a very slow leak coming from the bleed port. The ...
0 votes
1 answer
65 views

Brake sensor wire

I have an electric bike, and I am looking for an electric wire that is attached to the brake lever. how can I get it? regards. Hussein Talib.
2 votes
2 answers
171 views

Fork V-Brakes won't come out

I can't remove these v brakes out of my fork, any idea how to remove these? Also, i unscrewed the bolts as you can see at the photo but still no go.
2 votes
6 answers
25k views

Alternatives for mineral brake fluid / oil (in a pinch)

In case you don't have 'original' bicycle specific brake fluid on hand (e.g. "Magura Royal Blood"), what might be a good alternative to use (in a pinch) in hydraulic (disc) brakes? (for brakes that ...
3 votes
8 answers
14k views

Can I fit my normal brake levers to the curves of the dropbars?

I ride Firefox Rapide 21S, a hybrid bicycle. It has factory fitted flat-riser handlebars with Shimano EF500 levers for V-brakes with gear shifter integrated. I am an unprofessional rider, I always ...
5 votes
1 answer
330 views

Facing flat mount fork

Front brake on one of my bikes has always been near impossible to adjust. Since it is my first bike with flatmount calipers I thought that this is just specific to flat mount brakes. However recently ...
4 votes
3 answers
746 views

Replacing hydraulic brake lever

This is my first time dealing with hydraulic brakes. The front brake on my bike is Shimano BL-M4100 lever with MT410 caliper. I stripped the lever's clamp thread and going to replace the lever with a ...
11 votes
4 answers
3k views

Are my brakes overheating?

I'm riding a Giance Stance E+1 eMTB and recently had the brake pads and the rear rotor replaced by my Giant dealer, the brakes were worn out and the rotor had gotten damaged. Only a few rides in on ...
2 votes
3 answers
713 views

Changing rims from 29 inch to 27.5 inch, V-brake problem

I own an old MTB bike, it's beaten up and I'm planning to restore it. Everything is already done, groupset, crankset, the fork, etc. The MTB itself is a 29 inch frame and since I want to give this ...
5 votes
2 answers
215 views

Dual pivot rear brakes: Right pad in lowest position still too close to tire

I have dual pivot brakes on my Shimano 105 road bike. The wheels are Shimano RS010's. For some reason, the right pad on the rear brake is too high vertically, it's basically hitting the tire, but it's ...
3 votes
3 answers
6k views

How do I fix stiff dual-pivot brakes?

I have Shimano 105 Dual Pivot brakes on my bike. They are pretty old (~7 years), and, although I ride the bike very regularly, I do not use the rear brake much and it has become stiff. (By stiff, I ...
1 vote
4 answers
1k views

New road bike: alloy dual pivot brakes work poorly

I recently bought a new road bike (a very entry model - Giordano Acciao) which has alloy dual pivot brakes. The brakes seem to work poorly, even though they are quite tight. If I squeeze the brake and ...
34 votes
1 answer
152k views

What is the difference between I.S., post, and flat mount disc brake mounting standards?

What is the difference between "I.S." (international standard), "P.M." (post mount), and flat mount disc brake mounting standards? Does one have a clear advantage over the other and is there a ...

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