The 8.00/18 tire size is used on the rear of smaller, two-wheel drive (2WD) tractors, particularly mini or compact models used in agriculture. They provide the necessary traction for various light to medium-duty tasks in farming thanks to the large lugs and high void ratio that balances maneuverability and ground contact. They provide grip in field conditions depending on the specific tread pattern (like R1 for agricultural traction).