I used this pic as a reference as to where to place my air OR UNIFORM field (in "front" of the tyre, as if you were to place your hand on the top of the tyre, and move your hand direcly to the front of the car, but just before it would hit the weelwell.)
See pic for my illustration.

Then connect a turbulence field to it, and key the magnitude of the turbulence to increase as the wheel spins faster.
(you could use SDK (set-driven-keys) for that to make it more fluid

Good luck!