This wheelbarrow is sold as a single wheel with our 15"x4" flat rib flat-free tire, superior roller bearings for easy rolling of 450 pounds, heavy duty pre-welded steel frame, roll bumper to prevent damage to partially-set concrete or sensitive landscapes and special stay to prevent damage to the tub. Perfectly balanced, this model is professional quality exceeding rental standards. It is the only poly tub that is guaranteed for over a year.