Garden Cart Replacement Wheels - Thickened Galvanized Steel & Rubber Tires & Cores. 5mm thick and 5mm wide brackets and base plates are stronger, wear-resistant, rust-proof, and the 360° swivel caster has a very durable load-bearing capacity. It is not easily crushed or rusted. It is ideal for heavy-duty industrial casters. rubber wheels can be used on most standard wheelbarrows unicycle wheels - 8" heavy duty casters have a greater load capacity, move quietly, and are easier and less time consuming to use. rubber has a good rebound and provides an easier ride than solid tires. for better maneuverability, the casters are designed so that you can transport your items with ease. trolley casters - the textured surface of the outer tire is concave and convex, which enhances friction and improves the comfort of wheel pushing, smooth riding, high rebound, good shock absorption and impact resistance, suitable for concrete floors, floors, paths dirt, gravel roads, etc... bag cart wheels