Quote:
Originally Posted by
Hamslay
There's no spring or anything to actually move the pads away from the disc when the pistons retract slightly. Even if the pistons are moving smoothly, is it not possible for the pads to remain in light contact with the disc anyway??
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Yes. There is no return spring as such, so the discs do very lightly touch the disc, but not so as you'd notice and certainly not enough to make the discs hot. This is why even the slightest amount of corrosion on the pistons or sliders will hinder the pads' return after the brakes have been applied. There is a certain amount of springiness in the disc (and as its floating) which will help return things back to an equilibrium. Other than that you are reliant on a lot of components sliding freely.