Marathon 4.80/4.00-8 pneumatic (air filed) universal fit wheelbarrow tire &wheel assembly, 3" centered hub, 5/8" ball bearings, spacer kit, ribbed tread, 400 lb load capacity, not for highway use, inflate with manual pump only, includes spacers to convert 3" centered hub to 7" hub length and 3/4" bearings to accommodate larger axle size.