Marathon Flat Knobby Wheelbarrow Wheel, 16 x 480/400 8 in. is crafted from solid polyurethane, ing the bounce and load characteristics similar to a pneumatic tire but with the added advantage of going flat. This durable tire features a dense outer skin that provides exceptional resistance to abrasion and chemicals, ensuring long-lasting performance. Designed with a knobby tread, it delivers reliable traction for various surfaces. The wheel supports a weight capacity of up to 500 pounds and includes a standard 5/8" axle. With a tire size of 4.80/4.00 x 8", this flat tire and wheel combination is an excellent choice for those seeking durability and convenience in their wheelbarrow accessories.