Rubber pneumatic wheels often do not provide reliable traction on the soil when performing tasks such as plowing, planting and harvesting potatoes. To improve traction and grip with walk-behind tractors, lugs are used. It is recommended to use wheels of smaller diameter when performing heavy work - plowing, hilling, etc. to increase the tractive effort and reduce the speed of the walk-behind tractor. Larger diameter lugs are used when it is necessary to protect plants from damage by the walk-behind tractor gearbox.