Questions tagged [disc-brake]

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

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0
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3answers
62 views

What are the typical range of maximum braking forces?

There are some good references for the maximum deceleration which can be reasonably attained by a bicycle. It seems that ~0.7g is a typical value. However, this does not address whether the brake ...
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2answers
117 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
81 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
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2answers
91 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
486 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
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1answer
134 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?
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0answers
39 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
78 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 ...
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4answers
164 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 ...
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2answers
61 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
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2answers
99 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
127 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
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2answers
368 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
325 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?
1
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1answer
123 views

Disc brakes are squeaking

I bought a new bike that has mechanical disc brakes. They were squeaking really hard. I tried aligning the caliper. Now the squeaking noise is gone form the front brake, but not from the back brake. I ...
1
vote
1answer
103 views

Front wheel is not aligned and touching the brake line

On my bike the front wheel is not centered below the handlebars, instead it seems to be more on the left side. Weirdly that's also the side where the disk brake is located and the wheel is touching ...
-1
votes
1answer
428 views

Canyon Endurace CF SL Disc: 7.0 vs 8.0 [closed]

Mission: On the market for a new road bicycle. Since May 2020 I stepped up my cycling and will probably at least triple the yearly kilometres (3k?). So I want to treat myself and I decided to invest a ...
1
vote
1answer
41 views

Lost bearing on disc brake for Kona Jake The Snake 2016

I have this bike, and I appear to have lost the bearing on the front wheel, causing the disc brake to rub up against the fork when I'm riding. (I'm not a bike expert, so sorry if I'm using the wrong ...
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2answers
80 views

Hydraulic disc brake clicks once when I pull the brake lever and the braking force is very bad

I have a brand new Trek Marlin 5 (1-2 months old) with hydraulic disc brakes and the rear brake doesn’t work well and when I pull the brake lever, it clicks once somewhere in the frame (cables inner ...
2
votes
1answer
72 views

Croix De Fer fork replacement

I own a 2019 Croix De Fer 10 and would like to replace its fork since I recently damaged it. I went on Genesis's website to try and find out exactly what kind of fork it is, I am quite new to bike ...
0
votes
1answer
753 views

What bolt size are Shimano brake caliper bolts?

A front caliper bolt on a shimano disc brake caliper came out while riding, and went lost, while the remaining bolt, which was a little bit longer and thus protruded a little was completely bent. ...
2
votes
1answer
46 views

What threads are used on Avid BB5 barrel adjusters?

I thought I might replace the locknut on my front brake barrel adjuster because the current knurled one needs pliers where it sits in an awkward place behind the mudguard stays. But it's an unusual ...
2
votes
0answers
66 views

Examples of disc brakes causing injury in pro races

Before disc brakes became UCI legal there was a lot of people arguing that they were more dangerous than standard v brakes in bunch races. Often it was highlighted that a very hot spinning metal disc ...
2
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1answer
45 views

Why do my front wheel/disc brakes squeal/moan when NOT braking

1 year old Trek 520 with mechanical disc brakes. When I am pushing the bike around, both with and without loaded panniers, the front wheel frequently makes a low pitched "squealing" sound--...
1
vote
1answer
97 views

Unfixable brake disk rubbing

I ride a Rabeneick TS5 2017 Alfine 8, bought in 2018, with about 5000km on it (mostly commuting on asphalt, in all weather (mostly dry), some easy forest trails). It has BR-M395 hydraulic disk brakes ...
11
votes
3answers
1k views

Why are Disc Brakes better in the Rain?

It is generally accepted that disc brakes will offer better performance in the rain on a road bike. But from reading many articles on the topic of disc vs rim brakes, I have yet to find any ...
2
votes
1answer
68 views

Disc brakes making a banging sound on steep descents

I got a new bike a few months back. Its a cheap decathlon Rockrider mountain bike so I am not expecting anything too special. However I have noticed that going down steep descents, even slowly, the ...
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0answers
56 views

How can I determine what postmount I need for my fork / rotor for front and back

I am planning to purchase Shimano Saint BL-M820 + BR-M820 hydraulic disc brake set for my Specialized Stumpjumper Comp and I have no idea what post-mount to buy since I changed my fork and I am pretty ...
1
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3answers
1k views

Front disc brake rattling noise

I recently purchased a brand new Scott Genius 950 at a local bike store. After bedding in the brakes, I noticed a rattling noise while riding coming from the front disc brake. I brought it back to ...
4
votes
2answers
107 views

Flipping or rotating pads?

I went to replace the pads on my front mechanical disc brake. I noticed the pad on the stationary side had significantly less wear than the pad on the actuated side. Could I get away with flipping ...
1
vote
1answer
408 views

Why do some disk brake pads use split-pins or bolts to retain metallic or resin pads?

With Shimano disc brakes, there are two options for types of brake pads: resin or metallic. My understanding is that the metallic brakes generally have more stopping power while resin are more ...
0
votes
1answer
74 views

Disc brake conversion for Trek 7.5 FX from 2012 [duplicate]

Looking for a few tips to help me with a project. I got a Trek 7.5 FX 2012 as a hand-me-down and love the bike, but I am having trouble getting used to the brakes. I would like to do a conversion to ...
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2answers
111 views

Upgrading the brakes on a Giant Anyroad 2 2015

I am looking to buy some used Giant Anyroad 2 2015. The groupset is already upgraded to Shimano 105 2x11, with cassette 11-34t. Crankset are Tiagra. Everything look fine, except the brake, which still ...
4
votes
1answer
98 views

Pulsating and screeching after changing disc brake pads

Please bear with me, as I am very new to bicycle maintenance. I changed the brake pads in my front brake (Tektro Auriga on a Rockrider 540 bicycle), as I was unhappy with the braking performance and ...
3
votes
1answer
261 views

New Shimano 105 hydraulic brake loses pressure

I have a brand new bike with about only 25 miles on it. On a ride today the rear brake (Shimano 105 hydraulic) became spongy, letting me max out the lever but giving on about 25% of braking power. I ...
4
votes
1answer
395 views

Is this a disk brake mount?

This is a picture of 2011 scott contessa 60: Is this some kind of disk brake mount? If yes - what type is it? I've got an avid bb7 (mtn) caliper and it'd be nice to install it here.
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2answers
64 views

Can I convert the brakes from rim to disc [duplicate]

I have a 1990s vertik 2 it's the mountain bike one and I am wondering if I could convert the rim brakes to disc brakes if so what are good budget options
2
votes
3answers
268 views

Buying parts for an extra set of wheels: will a an 11 speed freehub body accept a 12 speed cassette?

I'm mechanically inclined, but I don't know much about modern bicycles. I have a Rocky Mountain C70. Since I live in the city, I'd love to have a second set of wheels that aren't knobby for the paved ...
2
votes
4answers
167 views

Disc brake pad replacement, or replace whole caliper?

We have a Boss Stealth 26" men's mountain bike with Zoom brand disc brakes. The disc brake pads are worn and need replacing, the problem is finding a workshop who can fit them as apparently it is a ...
7
votes
1answer
1k views

Can my fork support disc brakes?

I want to put disc brakes on my bike but I do not know which type to put on
4
votes
1answer
195 views

Why are bolts of brake discs using Torx sockets?

Most bolts on bikes are using hex sockets. However, there is at least one exception: the 6 bolts of brake discs, which usually have Torx sockets. What is the reason for this? Has the Torx socket a ...
1
vote
2answers
431 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
57 views

Shimano Alfine lever does not seem to pump oil into the hose even with reservoir full

I am trying to refill a Shimano Alfine BR-S500 disk brake system with oil. I have filled the reservoir with mineral oil... And am repeatedly squeezing the lever, but it feels like no oil is getting ...
4
votes
1answer
585 views

Is it common for the left side spokes of a front disc wheel to have more tension than the right side spokes?

Wiping my bike down after a wet ride, I noticed that the left side spokes on my front wheel are tighter than the right side. I don't have a tensionometer but squeezing pairs on each side and plucking ...
1
vote
1answer
237 views

Cleaning Contaminated Disc Rotors

I've had an eternal struggle with my current bike over brake contamination. The levers and calipers are shimano ultegra r8000, so the latest and (almost) greatest. I first noticed it when I took it ...
1
vote
1answer
114 views

Creaky hydraulic disc brakes on MTB

I am having some trouble with my Boardman Mht 8.8. Whenever I press my brakes while stationary, and move the bike with them engaged, a creak and clunk sounding noise appears, every time. This ...
0
votes
1answer
53 views

Looking to get correct size bike

I'm 59 years old, 6'6" with 36" inseam, I presently have a carbon Teschner road bike. looking for at either a gravel bike or hybrid bike I have not decided yet, but my main concern is getting the ...
3
votes
1answer
85 views

What are these two “clips” on the bolts holding by rear disc brake bracket to the frame? [duplicate]

My rear disc brake is attached to a bracket, which is attached to the frame. This bracket is held by two bolts that each have a clip on them: The clips are clamped around the bolts, and can easily be ...
2
votes
1answer
321 views

Replacement brake pads for Tektro HD-R210

What model pads would be a replacement for Tektro HD-R210 brakes? I haven't seen the model mentioned in Tektro's documentation https://www.tektro.com/upload/Product/F_20170613131999DtkdK8.PDF The ...
8
votes
2answers
804 views

Can I use a rim brake rear wheel in a disc brake bike, for indoor training?

I have a disc road bike (QR); I use it also with an indoor trainer with a specific training tire. I would like to buy a wheel to be used only on the trainer (with the specific tire). Since I don't ...

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