Why a wheel at the car in movement to twist easier

Wheel is rubber.
Being at a stop wheel turn creates pressure in rubber which you overcome. When pressure (its horizontal vector) in separate sites of rubber (protector ledges) exceeds a rest friction between the earth-rubber, these separate sites break jumping on other place of a road covering or other car accesories.

When the wheel is rolled, what that its part as though is at a stop during what that of time (if certainly pressure in a wheel not 1000 atmospheres) and that pressure of turn too is created, but it is a little because the wheel part concerning a road covering constantly varies dumping this pressure.

If on the car to dress steel wheels efforts in movement and in rest it will be approximately identical to wheel turn. And if the road covering too is steel the effort will be almost identical.
Approximately and almost – because even the steel is valid pressure everyone there and things in common between a wheel and a covering not a point, and quite to itself the area.

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