The Hi-Run Ribbed 4.00-6 2PR tire comes pre-mounted on a durable steel wheel and includes both 5/8"(installed) and 1/4" 1/2" spacers plus 3/4" bushings —everything needed to fit almost any standard wheelbarrow in minutes. The classic rib tread rolls straight and steady over grass, gravel, or concrete while the lightweight air-filled design handles everyday loads up to 300 lb at 30 psi without straining your arms. Perfect for homeowners who want a fast, no-hassle swap that ends wobbly wheels and lost spacers for good.