Upgraded One Piece Welded Rims: These wheelbarrow wheels are equipped with double sealed ball bearings to flexibly pivot and balance loads, allowing you to enjoy a balance of traction and maneuverability. Heavy-duty ball bearings and steel rims good traction and vibration dampening during riding for more stability and comfort. The high-strength, single-piece welded rims that they ' bend or separate from the hub when loaded with high-capacity cargo Abrasion And Blowout : 4.00-6 tire and wheel with high quality material and extra thickness prevents punctures or blowouts and is suitable for a wide range of road conditions such as sand, gravel, and rugged road surfaces. The wheelbarrow tires are designed with a straight tread making the tires have low rolling resistance, low noise, not easy to slip sideways, and have good maneuverability, allowing you to move effortlessly on gardening and general residential solo wheelbarrows Wide Applicability: This tire and wheel assembly is the perfect replacement for a 4.00 inch x 6 inch tire-size solo wheelbarrow. Suitable for wheelbarrows, garden carts, lawn mowers, generators, unicycles, boat sliders, utility vehicles, scooters, hose reels, , dump trucks, and other equipment, perfect match for your model Colour:black Material:PU+Metal Package Contents: 1 * wheelbarrow wheels 1 * Accessories kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.