13 in Pneumatic Wheelbarrow Tire & Assembly by Farm & Ranch at Fleet Farm
Marathon Universal Fit Pneumatic (Air-Filled) 14.5-inch Tire and Wheel Assembly, Replacement for 4.80/4-8; 4-8; 4.80-8; 4-6; 3.50-8, Wheelbarrow/Cart Use, Castle Tread in the Wheels & Tires department at Lowes.com
USA made - Flat Free Wheelbarrow Tire
Amazon.com: 4.80/4.00-8 Tire and Wheel 1 inch Axle, 3" Hub Flat Free 16 inch Solid Tire Replacement Wheelbarrow Wheel 4.80-8 for Log Splitter Wheel Barrel Yard Cart Garden Wagon : Patio, Lawn & Garden