Device for providing a more even motion for a tractor on fields or arable land with uneven ground, by in the front of the tractor arrange two or several pressure wheels (1,2) that run beside each other in front of the wheels of the tractor. The wheels (1,2) are arranged displaced laterally and longitudinally so that they like a plow can push large stones or earth clods to the side alternatively evening the ground in front of the tractor wheels by the pressing down effect.
