Marathon 4.80/4.00-8" Pneumatic (Air-Filled) Tire on Wheel, 3" Hub, 5/8" Bearings 4.80/4.00-8" Tire. 15.5" Tire Diameter. Pneumatic (air-filled) tire Ribbed Tread 3" Centered Hub 5/8" Ball Bearings Perfect for Contractor Wheelbarrows Most Common for 6 Cubic Foot Wheelbarrow 400 lb. load capacity Inflate with manual pump only Not for highway use