Bicycles

Questions tagged [disc-brake]

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

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2
votes
1answer
50 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
408 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 ...
1
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2answers
98 views

Can I convert rim brake to disc brake on road bike?

I have a Giant propel advanced 2 (2017) road bike, 105 groupset, rim brakes. I would like to buy a set of deep section racing wheels and unsure if disc brakes are an option or not. Is it possible to ...
0
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0answers
40 views

Inserting pistons in caliper

What do I have to know when inserting the piston? What is the requirements to the size of the gland and squaring? Do I have to use a special tool for replacing or inserting the second piston?
3
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1answer
422 views

Rotor rubs caliper after every ride

I've noticed the rotor on my front wheel rubs on the outer caliper's brake pad after I go for a ride. I've adjusted the wheel alignment a few times just with the quick release mechanism to get the ...
2
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1answer
99 views

Where is the grease on my front brake caliper coming from?

I've had a new road bike for three months to commute. I live on the east side of Hawai'i island so I'm often riding in the rain. A few weeks after I first bought the bike the front brakes started ...
1
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1answer
128 views

On Shimano disk brakes, are both pads supposed to move?

I have Shimano disk brakes (cable operated, no hydraulics), they are still pretty new. I noticed that under braking, only one of the brake pads moves inward. Is this how they are supposed to work? ...
1
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1answer
64 views

Shimano hydraulic hose - BH90-SB compatible with BH90-J/JK

My problem, I have a complete M7000 (MTB) brake set that uses SM-BH90-SB hose, and now I want to connect a 105er BR-R7070 brake caliper that needs SM-BH90-JK-SSR or SM-BH90-J-SSR hose. Are the two ...
4
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1answer
229 views

Pros and cons of mixed hydraulic/mechanical brakes vs pure hydraulics

Title of question is self-explanatory. Recently, it was added to the market brakes that are an hybrid mix between the mechanical Bowden steel cable and hydraulic system, which their oil tank is near ...
2
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1answer
187 views

Shimano hydraulic brake loses pressure

I recently changed the brake pads on my Shimano 105 (ST-R7020), and when pushing the pistons back, I felt a "pop", and the pistons moved back with no resistance at all. After using the bike for a ...
0
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2answers
299 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 ...
1
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2answers
114 views

New disc-brake, rotor, pads; terrible braking performance

I replaced the following: Front brake: a brand new Magura MT4 (pre-bled) brake with brand new pads installed Front rotor: replaced it with a brand new Magura HC Storm 203mm rotor I used the correct ...
-1
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2answers
162 views

Upgrade 160mm to 200mm disc brake rotor

I want to upgrade my mtb's front brake to a 200 or 203mm brake rotor. current setup (180mm): My front fork's posts are for a 160mm rotor (without any adapters/brackets, with the brake caliper bolted ...
0
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1answer
159 views

Hydraulic Disc Brake (how to choose correct model)

I recently broke off the lever of my front brake and am looking for a replacement lever or front brake. Need some input/suggestions from more experiences riders. Some of my questions: What are the (...
1
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2answers
66 views

Disc brake pad release allen bolt

I have an Tektro Auriga Comp Hydraulic Disc Brake System. It's been running worry free for ~10 years. But now I need to replace the rear disk brake pads (for only the second time). However the 3mm ...
5
votes
3answers
171 views

What are these rubber rings on my brake caliper bolts for?

I have purchased a disc brake adapter which came with a set of mounting bolts for mouting the adapter and the caliper together. The bolts have a rubber ring on them, but I'm not sure what it's for. ...
0
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1answer
101 views

My front disc brakes are rubbing despite my efforts

I tried everything Reset pistons Reseat caliper position Credit card method Brakes become very tight after a few squeezes Update: I went to the bike shop twice, they reset the brakes twice, ...
0
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1answer
78 views

Rear disc brake

The rear disc brake on my son's mafia when engaged seems to pull the wheel to the left making the tyre rub on the frame. Any advice would be greatly appreciated. Cheers.
13
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4answers
4k views

Front disc brake wobbling / grinding on pads after full braking and minor plunge

The front disc brake grinds after a light accident with full braking and plunge. To give an idea of the forces involved: The bike fell to the left, mostly cushioned by me. The bike had no more ...
1
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1answer
147 views

Difference between Shimano SM-RT81 and SM-RT81-A rotors?

I am working on a retro/new bike project and I have bought the Shimano SM-RT81-A 160mm discs whit Shimano SLX-M7100 brake calipers. I have seen that the brake pads on the front rotor are about 5mm ...
4
votes
2answers
154 views

Disc brake fork with QR and vertical dropouts: worrisome?

The pic below is from the fork of a 2020 Kona CoCo. Eyeballing it, it seems to me that an arc around the disc caliper contact point would pass straight through the dropout. Should this be worrisome? ...
5
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3answers
1k views

Is it safe to run disc brakes up front on a mountain bike that lacks a disc caliper mounting point in the rear?

Upon sharing my thoughts in an answer to a Bicycle Stack Exchange question, I wondered about my suggestion to use a disc brake up front on a frame that, lacking a disc brake caliper mounting point at ...
4
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2answers
99 views

Is the lateral brake disc position standardized (and, if so, to what tolerance)?

I am thinking about getting a second wheel set for my CX bike to be able to easily swap between road and off-road tires (and possibly run a tubeless setup). The bike is equipped with 12mm through-...
7
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5answers
2k views

Endless disc brake issues

We've purchased a new e-bike for commuting, its very heavy and carries a heavy load, and the commute is through a very hilly neighborhood. The mechanical disc brakes have become a constant issue, ...
3
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2answers
784 views

Shimano GRX 2x11 brake rotor compatibility

I am looking for possible disc rotors for the GRX 2x11 that comes with the GRX BR-RX810 brakes but can just find one recommendation which are the Shimano Ultegra SM-RT800 Center Lock Ice-Tech, that I ...
1
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2answers
108 views

Replace Shimano MT500 Caliper

I'm not finding a huge amount of information online about doing a caliper (only) replacement. My rear Shimano MT500 is having issues and I urgently need to get it working, therefore I've purchased a ...
0
votes
1answer
115 views

Shimano MT500 leaking from bleed port

My rear Shimano MT500 hydraulic disk brake has acting up for a while. After doing a full bleed and new set of pads it would be fine for about 2 weeks then start rapidly losing performance and ...
0
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0answers
91 views

What force (in newtons) are disc brake mounts built to handle?

I'm testing a dropout design and wondering what the standard force is considered for disc brake mounts. Simulation of mine suggests a safety factor of 15 with 2000 newtons applied to the ISO brake tab/...
1
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2answers
95 views

My wheel tilts to the left (to the disc side) any solution

My front tire tilts to the left when I brake hard when speeding on my bicycle. I tried almost everything to get it fixed but no luck. Can you guys tell me the reason for that? If you know how to fix ...
7
votes
4answers
736 views

Can disc brakes cause front quick-release to loosen?

I just purchased a Yuba Spicy Curry Bosch cargo bike with disk brakes and quick release skewers on both wheels. I haven't had any issues with it so far, in fact, I love riding it, but I have read that ...
0
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2answers
495 views

How to adjust brake lever travel?

I am trying to adjust the brakes of a new bike and need some help. It has mechanical disk brakes. I have successfully aligned the disk pads so that they are parallel and are at an adequate distance ...
5
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2answers
3k views

Why do my bicycle brakes get worse and feel more 'squishy" over time?

My bike has disc brakes connected to the lever by cable. I've found I've been tightening the screw by the lever more and more to the point that there's not that much more room to tighten.
1
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2answers
126 views

Tektro Spyre C — is the rotor riveted to the hub?

I recently bought the Cube Nuroad FE. I features Tektro Spyre C mechanical disk brakes, and I am underwhelmed by their stopping performance, especially on the rear wheel. I am thinking about changing ...
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1answer
75 views

Looking for the perfect frame [closed]

I'm looking for the perfect frame for my next build and looking for suggestions. This is going to be a commuter bike. I want disc brakes with thru-axles, a classic road-ish geometry as much as ...
1
vote
1answer
73 views

What is the ideal brake pad material for a MTB used in both downhill and cross-country/Single-track settings?

all! I and my wife both spend a lot of time doing both downhill and single-track MTB in New England. We both are still on our stock organic pads, and are looking to replace our pads soon-ish. I, ...
0
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1answer
189 views

Tune mechanical disk brakes TRP Spyre C

On my bike I have SRAM Rival levers paired to TRP Spyre C mechanical disc brake calipers. I'd like to tune them to "brake harder"; currently, I have to press more than half of the way on order to ...
4
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1answer
1k views

Disc brake equipped time trial bikes in grand tour

Why did team Deceuninck–Quick-Step ride disc brake equipped time trial bikes in a relatively flat course through Brussels in stage 2 of the 2019 Tour de France?
2
votes
2answers
436 views

Hydraulic discs on commuter bike

Does anyone have any recommendations in favor/opposed to hydraulic disc brakes on a commuter bike? I'm considering building up a new commuter with discs but, as an old-school kinda person, I have no ...
7
votes
2answers
395 views

Total brake failure - trying to understand what happened

As I've mentioned elsewhere I recently had quite a bad crash - broken collarbone, shoulderblade, and a rib. The circumstances are rather unusual: both brakes failed totally. Crash details for those ...
0
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0answers
72 views

Rear disk brake fluid leak

I tried to adjust the pads on my rear brakes but it caused some mineral oil to leak. Not sure why. I only used couple screws to allow brake pads to adjust. What could cause the leakage? What should be ...
0
votes
2answers
749 views

Removing WD40 from disk brakes - possible? [duplicate]

So I was stupid enough to get a fair bit of WD40 on my disk brakes. I tried cleaning them by removing the wheel, cleaning the disk (with soap) and to spray soap in between the brake pads and wiping it ...
1
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2answers
485 views

Rotor does not fit between pads after replacing the pads

I was having rubbing noises and after taking out the pads I so they were completly worn out. I have shimano r7070 calipers so according to their specs I found in a local shop the L04C as they did not ...
2
votes
1answer
467 views

Will replacing 26“ suspension fork with rigid 29”

I have an old Nashbar mountain bike with a suspension fork. I would like to replace the fork with a rigid one. The suspension fork weighs tons and is too squishy since I ride it mostly on trail paths. ...
8
votes
2answers
353 views

Is there a standard disc brake mount to disc brake rotor distance?

I'm new to disc brakes and trying to figure out what I need to buy to buy them for a wide fork (135 mm dropout spacing) with IS disc brake mounts and an electric front wheel. I've researched, but I ...
1
vote
1answer
139 views

Disc brake rub problem

There are a lot of answers for this topic already but I haven’t been able to fix it yet. When my disc brake caliper bolts are loose the rotor does not rub but when I tighten them the rotor rubs. I’ve ...
1
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1answer
79 views

Disc brakes not separating with force

I have Tektro disc brakes on my bike, and I guess I pulled the lever when the back wheel was off. After the pads were not separating I tried to force them apart, but got no luck. Is it because there ...
4
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1answer
235 views

Can I use slider dropouts on my track dropouts?

My bike's dropout/fork-end basically look like this: and I wonder if I could use something like this to convert it into a vertical dropout with a hanger and disc caliper mount: I'll only be using ...
5
votes
2answers
1k views

Giant Defy Advanced 2 brake replacement

I just bought a 2019 Giant Defy Advanced 2, with Giant's "Conduct SL Disc" brake system and it's the only thing about the bike I don't like, for many reasons. But my question is, are the rotor mount ...
2
votes
1answer
140 views

BB7 disc brake pads

I have an Avid BB7 front disc brake on a cycle that appears to have a missing inner brake pad. The outer one and the butterfly clip are in place. What might account for this? The cycle is new to me....
1
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1answer
252 views

Upgrade disc-brake wheels

Just bought new bike with disc brakes. If I buy an upgrade wheelset do brake discs (rotors) come with? Or do you have to buy them separately?

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