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I own a mountain bike with mechanical disc brakes that seriously lack stopping power. I've tried tweaking things and replacing pads but always fell short on performance. I ride more on the road but sometimes offroad. I was just wondering: Does a fluid for making disc brakes "grab" better exist?

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    Have you tried bigger rotors? What bike and terrain do you ride?
    – Swifty
    Aug 3, 2018 at 17:31
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    Do you mean a fluid for 'washing' the disc pad and rotor, or the hydraulic fluid?
    – mattnz
    Aug 4, 2018 at 3:37
  • Brake cleaning fluid or alcohol!
    – Carel
    Aug 4, 2018 at 7:44
  • Well trains have a pipe that drops sand in front of the wheels to increase friction. You can all head over to Kickstarter for my Iron Rooster Disc Friction Enhancer.
    – Henry Crun
    Aug 5, 2018 at 7:41

2 Answers 2

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Not that I have ever heard of. Any liquid on the rotor or pad would tend to act as a lubricant and get worn or washed off anyway.

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Mechanical or hydraulic brakes ?

If mechanical, maybe the cables are not tight enough ? or too used ? If hydraulic, maybe there's a leak in the system ?

In both cases, maybe the pads are too worn out ? maybe the brakes rotors themselves are dirty or worn out or have some oil/grease/dirt on them, clean them out.

Have a looksie at :

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