On: Dust from car brakes more harmful than exhaust, study finds

[rightbyte]

> When you let off the brake pedal, the pressure is removed, but there’s not a “retraction” of any kind. So there’s no pressure but nothing is actually making that gap.

The wobble pushes the pads back in, right?

[smitelli → rightbyte]

A healthy disc shouldn’t wobble enough to push much of anything. We’re talking like 1/20th of a millimeter.

[rightbyte → smitelli]

Should be enough to relieve the pads I think? The less wobble the less the pistons need to retract too.

I mean you can hear scratching when the pistons get crusty and the don't retract like they are supposed to.