Quote:
Originally Posted by n0thing
my caliper pistons are very stiff to retract, even when using the spreader tool, but braking operation feels fine...
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Quote:
Originally Posted by kch
Mine too. I really have to crank down on them with the spreader, even with the reservoir cap open.
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The calipers actually depend on seal stiction. Normal brake operation is within the range where the piston seals only flex inside the caliper. As the pads wear past a certain point, the seals slip a little and go back to flexing.