Marathon 4.80/4.00-8" Pneumatic (Air Filled) Tire on Wheel, 3" Hub, 3/4" Bearings, Ribbed Tread 4.80/4.00-8" tire. 15.5" tire diameter. Pneumatic (air-filled) tire. Ribbed tread. 3" centered hub. 3/4" ball bearing. Perfect for contractor wheelbarrows. Most Common for 6 Cubic Foot Wheelbarrow. 400 lb load capacity. Not for highway use.