Originally Posted by
Koyote
Remove wheel, push pistons outward as far as possible, remove old pads, insert new pads, reinstall wheel, then give a couple quick squeezes on the brake lever. DO NOT squeeze brake lever while wheel is removed, DO NOT open the bleed port.
So the idea is that pushing the old pads back pushes the fluid back upstream into the reservoir in the brake lever housing, there's no need to open the bleed port to relieve fluid back pressure? Simple enough.
Any particular 'special tool' needed to push pads back into calipers? I'd opt for a largish flat-bladed screw driver myself unless someone had told me beforehand something else is safer as well as more practical.