Questions tagged [disc-brake]

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

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2
votes
2answers
146 views

Disk brake and wheel is moving: is my fork too long?

In the links I gave below, the website is in French but you can change the language. Following this thread I bought new bike components to build my own bike. In particular I bought Surly Steamroller ...
6
votes
2answers
101 views

Is the banjo bolt the same between the Shimano XTR and Shimano Saint rear brake caliper?

Earlier today, I went to install a brand new Shimano Saint caliper in place of an old XTR that's leaking from the pistons, only to find that Shimano doesn't include the banjo bolt... Do the XTR and ...
1
vote
1answer
70 views

Disc brake mount/adapter bolt length

My bike's frameset has IS mounts. The mounts are 9.6mm thick. I bought a pair of IS to post mount adapters but they don't come with bolts. The adapters are 11mm thick. How long should the bolts be? ...
8
votes
6answers
918 views

QR Skewer orientation

Sheldon Brown's site suggests that QR skewers should be installed with the levers on the left side of the bike, "so the derailer [sic] doesn't interfere with it" and that "Usually, the ...
0
votes
1answer
43 views

Looking for recommendation of disc brake to replace Formula RX

I have a relatively old hardtail MTB installed with Formula RX brake system and rotors SM-RT53 (160mm) / SM-RT53M (180mm). Now I have to replace the brake system and would like to have some advice. To ...
4
votes
4answers
863 views

Replacing disk brake pads with multi-tool only

During my cycling week I only had my multi-tool with me. Back home and intending to replace the brake pads, I realized that I have to use pliers if I want to unbend the end of the cotter pin without ...
2
votes
1answer
130 views

Why do disc brakes stop faster in dry conditions?

I have heard that bikes with disc brakes have shorter stopping distances even in dry conditions, such as the comparison in this video: GCN - How Much Faster Can You Stop With Disc Brakes? At about 1:...
2
votes
3answers
154 views

Hydraulic brake bleed fail - try again or replace?

I bled and completely replaced the fluid on a set of Tektro Orion hydraulic brakes, using Shimano mineral oil. Before bleeding, one worked a little bit, and the other didn't at all. In my impression,...
0
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4answers
126 views

Replace v-brakes with disc brakes [duplicate]

I would like to know whether I can replace my old v-brakes with disc brakes. Do I need to also change the wheels or something else?
2
votes
2answers
170 views

I got a leak on my shimano 105 R7020 STI

My caliper rotor push oil back in the STI. All of the sudden mineral oil started leaking. Do you know SKU of this part?
0
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1answer
76 views

Looking for a good mountain bike for my daugher. Want disc brakes and Fork lockout [closed]

My daughter is a teenager and we love going biking, either on trails or during camping trips. We are not hard core bikers, but she is ready for a bike upgrade as she is using a 20" wheel bike ...
3
votes
4answers
3k views

I mistakenly put WD40 for my disc brakes and now pads not anchoring as well as before. Any solution?

I heard it wears off after a few rides but it is still not gripping firmly. Is there any solution for this? I also saw using rubbing alcohol. Is that sufficient?
3
votes
2answers
160 views

Very narrow gap between pad and brake rotor

I have just retired my Tektro brakes (13 years of service) and replaced with a pair of cheap Shimano MT200. I have a problem with extremely narrow gap between the disk and pads. The gap is so narrow ...
0
votes
1answer
116 views

The outside diameter of the brake rotor rubs against the caliper

I have upgraded my bike with a new front suspension fork. Bought and fitted an adaptor from Shimano as the fork is laid out for 160mm (Postmount 6) and my disc front wheel brake rotor is 180mm. ...
0
votes
1answer
72 views

What features make a disc brake caliper unsuitable for use with other than resin pads

Shimano says its Tourney mechanical disc brake is "designed for resin pads only". What is it about the design of a brake caliper that makes it suitable only for resin pads?
2
votes
2answers
200 views

How to clean brake pads properly to stop squeal?

I bought a new MTB recently that came with TEKTRO HD-275 hydraulic disk brakes, after two weeks it has started to squeal, then I clean both front and back pads with Isopropyl alcohol and 120 sandpaper,...
2
votes
2answers
108 views

Is a “universal” rotor compatible with all types of disc pads?

What is a "universal" disc rotor? One that is compatible with all types of brake pads?
1
vote
1answer
50 views

Do you need to open the calipers of a hydraulic disk brake in order to clean it?

I would like some advice about cleaning disk brakes. Recently when I've braked I've occasionally heard a noise as though air is being released, not a squeak or croak but it sounds like there is ...
4
votes
3answers
378 views

Replacing a lost disc brake pinch bolt

While replacing the cable for my front disc brake, I lost the bolt and plate that attaches the cable to the calliper. In this Park Tool guide, they call it a 'pinch bolt' — labelled E in the image ...
8
votes
2answers
527 views

Having one wheel set with 6 bolts rotors and one with center locks?

I'd like to purchase a second wheel set for my bike: to have one wheel set for road, and one for cross/light MTB, and swap them easily depending on the kind of ride I plan. My bike uses 6 bolts disk ...
4
votes
1answer
337 views

Why do my disc brake calipers fall out of alignment?

Every so often the Shimano 105 7020 hydraulic disc brakes on my road bike start to make a metallic grinding noise and I can feel additional resistance when riding. The culprit has always been ...
3
votes
1answer
109 views

what does “pre-bled” mean in the context of a cable-actuated hydraulic disc brake

I am shopping for disc brakes and looking at cable-actuated ones. What would "pre-bled" mean in that context?
3
votes
2answers
196 views

mechanical disc brakes and bikes with internal cable routing

One review of TRP Spyre that I read said the brakes didn't perform well until the reviewer installed compressionless-housing brake cable. Is that the general consensus? Jagwire says their ...
2
votes
1answer
64 views

How to identify whether a TRP Spyre mechanical disc brake is the post-recall version?

For online (bargain) shoppers who face the risk of possibly buying old stock, are there any markings on the post-recall TRP Spyre that could be used to clearly identify it as the new version?
0
votes
0answers
83 views

What does “unisex” mean in the context of mechanical disc brakes?

I see the term "unisex" used with mechanical disc brakes. What does the term mean in that context?
2
votes
5answers
164 views

what features do I give up if I buy the mechanical disc brake caliper costing one fourth that of another manufacturer?

I've always had rim-brakes on my bikes but now I'm assembling a bike with a frame that has disc mounts only. What features or qualities am I sacrificing if I opt for the $40 mechanical disc brake ...
5
votes
4answers
1k views

Is it normal that front wheel bends when front disk brakes are applied?

When I apply front disk brakes I see slight bend in the rim and wheel. Is this normal or I have a low quality parts.
4
votes
1answer
298 views

Magura rim caliper and Shimano hydraulic road lever compatibility

I have a trekking bike with a slightly short reach for me. On the other hand I wish to get a drop bar bicycle. I could check on this bike that the position is good with drop bars. On this bike I have ...
0
votes
1answer
532 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 ...
-1
votes
3answers
150 views

Big vibration with Tektro Auriga brakes

About a year ago I swapped the v-brakes with a Tektro Auriga kit. I immediately made a mistake by not properly bedding in rotors and pads, doing "powerful" brakes, sudden stopping of the ...
-1
votes
1answer
84 views

What is this hardware inline with the brake cable?

The brake caliper is an Avid BB7_MTN, but there seems to be some kind of additional element inline with the brake cable. From what I can gather looking at the picture, there's an electric cable coming ...
1
vote
2answers
103 views

Brake pad too low on rotor?

I just bought a new Clarks CFR-06 rotor to try to improve my crappy Tektro Auriga, but it seems that I made another bad choice. After just a couple of minutes of trials, I noticed that the pads are ...
5
votes
2answers
438 views

Which Shimano Centerlock Rotors Work with Avid BB7 Mountain Brake Calipers?

I spent a lot of time trying to figure this out, so I thought I would post this to maybe save others the hassle. The problem: Avid BB7 Calipers don't play nice with many of the popular Shimano ...
2
votes
0answers
40 views

Clarification needed on hydraulic disc caliper and lever compatibility

I have a Scott Solace road bike that uses Shimano BR-RS805 hydraulic disc calipers. The hose spec is BH 59. I want to change from drop handlebars to Jones H handlebars. I will need new brake levers. ...
0
votes
3answers
86 views

Will 180mm rotors fit my Carrera Vengeance Ltd. Edition bike?

So I would like to get Clarks M3 hydraulic disc brake set but the only size available is 180mm but i am not sure what to measure to see if this will fit my carrera vengeance ltd edition 16 inch frame ...
3
votes
3answers
539 views

Are center lock rotors less likely to rub or resonate while riding than 6-bolt rotors?

I use 6-bolts hub with 203mm rotor and despite it is well aligned and rub free sometimes when riding (even on flat surface) there is vibrations coming (I guess) from crankset and/or road enough to ...
2
votes
5answers
516 views

What are the typical range of maximum braking friction forces?

There are many non-bike applications which benefit from using bicycle hardware. Case in point, there is a long and rich tradition of using bike parts in aviation. One particular area of interest is ...
3
votes
2answers
205 views

Buying Cervelo P2 vs P-Series [closed]

I'm looking to buy my first tri bike and am considering between a Cervelo 2016 P2 (rim-brake) and the new 2021 P-Series (disc-brake). The P2 is brand new, but it's an old stock my LBS has on hand, and ...
3
votes
1answer
87 views

Disc brakes installation

I have got IronHorse Maverick 3.2 bikes with v brakes and I want to upgrade to disc brakes. The fork and frame both has Is mount so they should be able to get calipers on them with the right mount ...
-7
votes
2answers
123 views

Why did my 28-spoke front wheel lost all tension but rear only some?

I have an electric road bike with disc brakes. Its stock front and rear tires have only 28 spokes and a slightly deeper than ordinary rim. The hubs are cheap non-Shimano hubs, but their flange ...
3
votes
3answers
543 views

Disk brakes swap on a new road bike with rim brakes

I am planning on buying an Atomic Covert road bike. Can I put disk brakes on it? Are there adapters for rigid forks/road bikes or do I need to replace parts?
7
votes
1answer
202 views

Pad spacer and mechanical disc brakes

My bike, a Trek, has Tektro mechanical disc brakes. Do I need to insert a pad spacer when the wheel is removed to prevent the brake from locking if the lever is accidentally moved?
1
vote
0answers
57 views

new Clarks m2 hydraulic disc brakes won't retract when brake lever pressed

I just fitted a new set of Clarks M2 hydraulic disc brakes. I aligned the calliper to make sure the rotor doesn't rub the pads when the wheel is spinning. I then pressed the brake lever, when letting ...
2
votes
1answer
90 views

Barrel adjuster cable housing sticking out, why?

I've been trying to adjust my front brakes and when I released the brake lever arm (on the disc brake) and moved the arm to the furthest back position, I noticed that the cable housing at the brake ...
4
votes
4answers
286 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 ...
0
votes
2answers
91 views

New bike disc brake noise

I have just bought a brand new bike which was put together in the store and the disc brakes, which I have never had before, make a very slight scratching noise. Does this need altering or is it fine ...
5
votes
2answers
173 views

New disk pads glazing during bed-in procedure

My bike is equipped with Sram Force Etap AXS and I've been using some BBB pads for quite a while. My bike shop recommended these, stating that they were compatible (and yes, they worked pretty well). ...
4
votes
2answers
187 views

Which bolt to use when aligning disc brakes?

I am struggling with a rubbing disc rotor on a new bicycle. Which bolts should I use when trying to align the caliper? The ones I marked in red, or the blue ones? I tried to use the red ones so far, ...
4
votes
3answers
585 views

What do I do if I get chain lube on my brake pads?

I was being extremely stupid and accidentally applied a little chain lube to my brake pads? I tried to sand them down a little and cleaned the disc rotor with rubbing alcohol, but the performance is ...
4
votes
1answer
713 views

Determine Rotor and Caliper Size

I bought a used mountain bike and it does not have a caliper or a brake lever for the front. How can I go about finding out what will work on this bike and where is a good place to buy online?

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