New answers tagged

-1

There seems to be several issues: Firstly, the pad position on the right arm looks a bit off. Release the pad nut, and adjust the pad to be perpendicular to the rim while pushing the arm with your hand against the spring so that the arm is close to the rim. Then, while continuing to push the arm, tighten the pad nut. Repeat with left pad if it's off too. ...


1

Sounds like you undid the pinch bolt that holds the inner cable to the brake mech, and some wire has slipped past. To fix that you need to reverse the process, by releasing the pinch bolt again and pulling some of the slack inner wire through. There might even be a mark, a dent on the wire to show where it used to be secured. As for getting fatter tyres ...


1

Your question lacks very important information: what types of brakes you use. I suppose sidepull caliper brakes are most likely because other types (V brakes, cantilever brakes) usually don't have release levers -- however, some drop bar V brake levers may have a quick release at the lever. A crude solution could be to use not only the release lever but also ...


2

I have been in a similar situation, when moving from 630 wheels to 622 on an old frame. I had Tektro R559 long-reach calipers, which worked on the front but the rear was still not long enough. I ended up making a dropper plate which provided a lower location to mount the brake. Would I do this on a front brake? probably not. If you file the ends of the ...


4

R7000 calipers are excellent but doing this with them is an experiment on both the mechanical advantage and safety fronts. The safety aspect is going to be 100% a yolo on your part. Nobody can unequivocally tell you it's safe, and any problems with strength or fatigue are likely to come down the line, not immediately. You're taking a component made to be as ...


2

The Tektro R539s are medium reach brakes. Reach, in this case, is the distance that the pads can travel in their slots relative to some fixed point (probably the brake's pivot). Most performance road bikes with rim brakes have/had use standard or short reach, which is usually something like 39-49mm. The R539s have a reach, as you can see if you find the line ...


1

This is a sign that someone has bled your brakes improperly. When bleeding the brakes, you're supposed to remove the wheel and brake pads, and put a bleed block in. The bleed block will only fit if the pistons are moved back to their original positions with a tool such as rubber-covered cone wrench handle (don't use any metallic tools to do this on ceramic ...


3

Being Hydraulic it is almost certain the caliper is double sided piston, where the pad on both sides moves. (Single sided calipers have a piston on one side, and push the disk onto pad on the other side). Presuming it is a double sided caliper, it is possible one piston is not moving, leaving the other piston to do all the movement and push one pad across ...


2

Assuming you mean from side to side, many disc brake calipers push a piston in from the side and sandwich the disc between that piston and a fixed pad on the other side of the caliper. Part of the setup/adjustment process for such brakes is to set the fixed pad position as close as possible to the rotor without having it rub, so as to minimize the sideways ...


1

I think you have to open the bleed port. Beware of spilling, and have a towel with some isopropyl alcohol to wipe it down if it spill. That guy mentions your brake model and the bleeding port trick.


0

between two bicycles? Assuming the two bicycles have good brakes, this is solely caused by reaction time. The bicycle in the rear must be able to quickly determine that the bicycle in front has started emergency braking. I'd say 2 seconds of distance is a good idea. At 35 km/h, this is bit less than 20 meters, or bit more than the length of ten bicycles in ...


0

About 3 meters on a reasonably careful ride (below 25 km/h), but after the brakes have been applied (response distance). More like 25 meters if we add the 2.5 s time required to spot the danger already in sight and press the handles, but 4 meters of we assume a very vigilant driver with 250 ms reaction time. See the charts below for details. The formula (...


4

You have "play" in the system somewhere. The brake is working fine in stopping the wheel when the bike is upside-down, but the wheel alone weighs far less than the rest of the bike plus you. So, when the brake stops the wheel, it moves backward slightly, which flexes the area with play, changing the bike's geometry, which releases the play, and ...


3

How to open Tektro calipers: The little 'nose' locks the release in the closed position against accidental opening.


6

Check for something loose. Something is moving or flexing. Is the brake mounted tightly? Are all the brake components properly torqued? Is the headset loose? Hold the bike upright on its wheels, squeeze the front brake to hold the front wheel in place. Push and pull forward and backward on the saddle. Does the frame move back and forth more than a very ...


9

Insufficiently rigid disc forks can always shudder. In this case it looks like there's a ton of bushing play. If someone wants to post an accurate treatise on how exactly the feedback loop is working, they would certainly deserve the win more, but: there is some kind of feedback loop from things flexing when you actuate the brake that causes the catch and ...


1

Parts higher up the range typically have a better finish quality, use higher quality materials and hardware and may have special treatments on pivot points. Often they can be lighter due to using a stronger, more expensive material or process. That's the general overview. Certainly the 105 calipers will have a much better finish than the Sora ones and the ...


0

A "B" fit means that the part is interchangeable but the finish, graphics or potentially the shaping of non cantact parts is different. It will fit.


0

I know this question was asked 3 years ago (almost) but honestly centerlock is the better system. You can always get an adapter to use 6 bolt rotors on centrlock hub you can never go the other way around. Even though there's more available 6 bolt rotors in the market if you wanted to use shimano's ice tech finned rotors you're out of luck with the 6 bolt hub....


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