Guide brakes, sticky caliper Pistons- Mtbr.com
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  1. #1
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    Reputation: jdcatnau's Avatar
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    Guide brakes, sticky caliper Pistons

    I just bleed my Guide RS brakes and noticed that the Pistons did not evenly extend. So I took the pads out and stroked the lever then pushed the Pistons back into the caliper for a few times and they still are not balanced. I was thinking of trying the pit stop grease when I rebuild the caliper. Is this a good idea? Any input would be greatly appreciated.

  2. #2
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    Reputation: bigkat273's Avatar
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    This is why I switched out to Shimano brakes. You can try splitting the calipers then pull the pistons and clean/lube the seals with dot fluid. If that fails a new piston/seal kit is your last resort.

  3. #3
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    They will never just extend evenly. Even a minute amount of friction difference will allow one piston to extend first. With the pads installed, and a good bleed (no air in the caliper), everything will be fine.
    Side note: Most "sticky" pistons are a result of air behind the piston, not a need for lube on the piston seals.

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