Bit of a rant about single-piston calipers used on mid-sized and big Mopars

Residual valves. 3 psi if i recall correctly. There has to be some drag. Or pedal travel would be excessive.
Wheel bearings-a tad loose is better than too tight.i use a very short pair of slip-joints to lightly snug bearings, been doing them like that for 30 years.
If you were to measure the drag-after driving without touching the brakes you would find near zero drag.
I would stay away from the phenolic pistons,as they wear they like to **** in the bore, then you have drag...then smoke.