8
votes
Accepted
How can I keep my brakes centered?
The key to getting a side pull brake to stay centered is to get the pivot bolt centered and tight. You have the added challenge of getting the pivot bolt centered and getting the fender centered at ...
- 24.3k
8
votes
Accepted
How to prevent disc brake caliper from slipping while tightening caliper mount screws?
The technique I have had the most luck with is to gradually tighten the mounting bolts. Tighten the top bolt until it just starts to hit the caliper. Do the same to the bottom bolt. Keep alternating ...
- 19k
8
votes
Accepted
Facing flat mount fork
Yes, flat mount brake mounts can absolutely be faced and sometimes need to be.
The angled pad gap you show in the picture is the primary indication that facing is needed.
In facing operations it's ...
- 88.2k
8
votes
Caliper brake lubrication
How confident are you with hand tools?
I've had several sticky rim calipers, and one longer-lived solution is to disassemble and clean the insides of the pivot.
Downside, there's a lot of parts and ...
- 131k
7
votes
Accepted
Caliper brake lubrication
As you surmised already, you are suffering from a sticky caliper, and have diagnosed the solution, that is, a little lubrication.
I think most any lubricant would do, but some suggestions would be:
...
- 6,747
6
votes
I was leaning the bike against the wall
The bike must be able to handle such usage. And much worse. What can happen with some moderate force is moving the caliper very slightly out of alignment. Then it must be re-aligned. Out of alignment ...
- 17.4k
4
votes
How to prevent disc brake caliper from slipping while tightening caliper mount screws?
I struggled with this at first.
It helped to have everything clean, and to have good threads that engaged smoothly. I also used loctite which lubricated the threads on the way in and eliminated any &...
- 131k
3
votes
Replacing Tektro MD-M280
If you want to replace your mechanical by another mechanical the main specs to pay attention to are the mounting points and cable pull. They differ between "MTB" and road standards: MTBs use ...
- 24.7k
3
votes
What limits the rotor size in flat-mount brakes?
Disk brakes create a lot of torque on the frame or fork, where the calipers are mounted. Neither the caliper nor the disk are the limiting factors, but the frame or fork, that have to be designed to ...
- 1,797
3
votes
Accepted
Shimano BR-MT400 caliper upgrade?
You can replace just the calipers. If you want to re-use the hoses, your options are any post-mount Shimano calipers with an in-line style caliper hose connection.
If the hoses were the minimum ...
- 88.2k
3
votes
Accepted
What's the significance of "Inside" vs "Outside" caliper hose connection?
I think the main purpose is to help with the hose routing. Disc brake calipers are generally outside of the chainstay, so having the hose on the inside of the caliper reduces the angle formed by the ...
- 17.4k
3
votes
Why is there no pressure in brakes after leak?
If fluid was removed, it means there's air there now. If it was a lot of fluid, it means there's a lot of air in there. Air being easily compressible, enough air in brake system causes brakes to not ...
- 21.3k
3
votes
Can I replace my rear cantilever brake with a caliper brake?
I suspect you could do this. There is a brake bridge with a hole on centerline.
You will need a caliper brake with enough "reach" to get down to the rim brake track, and enough width to get ...
- 131k
3
votes
Can I replace my rear cantilever brake with a caliper brake?
You can't do this. First, by caliper brake, I assume you mean a road bike-style rim brake. To mount one of those, you need a bridge between the seat stays, and it needs to be drilled at the right ...
- 36k
3
votes
Accepted
Role of a mysterious clip on a front brake caliper screw
this manual (https://www.manualslib.com/manual/1590153/Shimano-Br-M8000.html?page=12#manual) suggests the clip is supposed to keep the bolt from coming off.
I'm not sure it is really capable to do ...
- 1,797
2
votes
Brakes rubbing on ride after centering, brand new bike
It could be a lazy piston, although these happen mostly for bikes that have actually been used, as opposed to bikes that are new. The most likely case is that you have a bike with two brakes, you use ...
- 21.3k
2
votes
Accepted
Schwinn Kids Bike brake caliper spring not attached. Help!
Unless my brain is broken, that spring is distorted. When in place it should look something like:
The spring needs to push the arms back open. Its uncompressed state should be more flat, as opposed ...
- 88.2k
2
votes
I was leaning the bike against the wall
Worst-case scenario, you bumped a brake component out of alignment and the only symptom will be that you hear the brake disc rubbing (in which case, have a qualified mechanic inspect the brake and ...
- 6,266
2
votes
Accepted
How to diagnose and fix a mechanical disc brake rotor that is bent
If the rotor is bent, it will contact one of the pads at a certain point (or area) of the rotation, but not all the time. Observe the gap between rotor and brake pad while rotating the wheel. If the ...
- 1,797
1
vote
Accepted
brake rotor offset inconsistency
It is normal for there to be slight variations in rotor tracks, even between rotors of the same brand. Because of the very narrow tolerances with disc brake pads, even these minor variations become ...
- 30.5k
1
vote
Accepted
Which brake levers and brake calipers to replace Sram s-series HRD700 (postmount)?
A lot here revolves around how much value you place on keeping the bike set up with SRAM 10.
Keeping SRAM 10 road bikes going is increasingly difficult. Most of the legacy support components for them ...
- 88.2k
1
vote
Rusty bolts/screws on Shimano Claris brake calipers
Below you'll find an Exploded View diagram of a BR-R2000, the Claris caliper brake. Note that the bolts, numbered 1, 8, 9 and 12 are pertinent to the caliper itself, while number 11 is a bolt for the ...
- 11.3k
1
vote
How to prevent disc brake caliper from slipping while tightening caliper mount screws?
There are two things you can do to significantly mitigate this issue.
The first is to engage the brake, as strongly as (safely) possible, while tightening the caliper mount bolts. Assuming you ...
- 2,166
1
vote
Shimano 105 Disk Brake Failure
It's very likely the root issue is damage to the ceramic pistons. Caliper seal issues on ceramic pistons Shimano brakes almost always are.
Genuine replacements are not available, though third party ...
- 88.2k
1
vote
I was leaning the bike against the wall
Sounds like the seat/chain stay touched the wall rather than the caliper. If it was a controlled lean - as you say there was not much force involved - and no damage (scratches, dents) or damage ...
- 4,576
1
vote
I was leaning the bike against the wall
The disc brake rotor and the brake cable+housing are the most fragile parts back there. The frame tubes and the caliper should be quite strong, especially close to the rear axle.
As long as the rotor ...
- 29.3k
1
vote
Accepted
Brake piston fell out during bleeding - anything to fix?
Getting a piston back in doesn't have too many hidden steps. You want to get everything clean with appropriate means - typically this would be a detergent wash that's safe for disc brakes and/or ...
- 88.2k
1
vote
Accepted
Is overhauling dual-pivot caliper brakes due when the centering screw is ineffectual?
There's not a generic answer because the sole unifying design element of dual pivot brakes is that there's a center pivot for one arm and an offset pivot for the other. The way the pivot hardware and ...
- 88.2k
1
vote
Accepted
What limits the rotor size in flat-mount brakes?
From a purely numerical standpoint, the mounting interfaces should be able to handle any rotor size. From this website, the highest torque generated seems to be around 100Nm, which for a 34mm spacing ...
- 17.4k
1
vote
Brake caliper not springing back all the way
Based on the text and your edits, the caliper doesn't have enough spring force to open itself up fully.
When its connected to the lever on the handlebar, there's a bit more tension added via the inner ...
- 131k
Only top scored, non community-wiki answers of a minimum length are eligible