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10 votes

Cannot remount wheel after installing new brake pads

When replacing the pads on (hydraulic) disc brakes, you first have to push back the pistons, as they are automatically adjusting for wear. Be careful, some pistons are ceramic and can be damaged if ...
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  • 1,041
7 votes

What is this "padding" on screws?

Re-answer (based on Szabolics' link in the comments): It appears to be either a (now weathered/aged) moisture seal to prevent water from getting into the caliper mounting threads OR a a crude ...
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  • 1,691
5 votes

What is this hole used for in this nameplate for Shimano 105 5800 Brake Shifter?

I'm not positive, but I believe the other two holes are for the mounting screws. That would mean that this third, non-beveled hole may be the access port for the grip adjustment screw. It would be ...
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  • 15.9k
5 votes
Accepted

Why aren't mechanical disk brakes self-adjusting?

I think the difference between hydraulic and mechanical disks is that there is no seal on mechanical calipers. You are saying that the seal "rollback/slip" mechanism doesn't require fluid to ...
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  • 21.4k
4 votes

What is this "padding" on screws?

I think it is a type of "loctite" paste that prevents screws from working loose during use , vibration , heat , cold etc.. Leave it on and reuse it when fitting the screws back again. Make ...
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3 votes

Why aren't mechanical disk brakes self-adjusting?

In mechanical brakes, the cable is of constant length. It can't become shorter or longer. In hydraulic brakes, you have a reservoir of hydraulic fluid. If the pad creeps on the seal (after the seal ...
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1 vote
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Rotor VS Caliper VS Pad compatibility

In terms of compatibility, the main attention point is about the pad type: resin/organic or metallic. Metal pads are able to withstand higher temperatures, and so you need to make sure that the ...
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  • 6,805
1 vote

Brake or Wheel Click under braking

Try to apply some grease to the spoke crossings, these can cause a clicking noise. In case of the rear wheel, the noise can also occur when pedaling, which is also solved this way. Park Tool PPL-1 ...
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  • 959
1 vote

What is this hole used for in this nameplate for Shimano 105 5800 Brake Shifter?

On my old 105 shifters, there's a boss on the block which goes into a locating hole on the cover - completely different to this but might be the same general concept. Two screws should do the same job ...
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  • 99.1k
1 vote

What is this hole used for in this nameplate for Shimano 105 5800 Brake Shifter?

Another possibility is that it is some sort of artifact from the injection molding process. I’m not too familiar with what that may entail, but I presume it could be the result of an alignment pin, or ...
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  • 10.9k
1 vote

"Lock" brakes so that they are always active

I've had trouble parking my bike against poles and walls where the front wheel flops over and the whole bike crashes into the ground. I've used the parking brake levers mentioned here that have a ...
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1 vote

Can I fit my normal brake levers to the curves of the dropbars?

In the time since this question was originally asked and answered, there is now a product that allows a flat-bar setup to be replaced with a drop-bar setup while keeping the brakes and shifters: the ...
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  • 1,138
1 vote

Can I fit my normal brake levers to the curves of the dropbars?

I have a Bianchi hybrid bike and I have found the simplest and most economical solution for getting the more aggressive riding position on it without changing to drop bars. I have attached two Onza ...
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