Specifications & Applicable Models: 4.00-6 air less rubber tire and wheel Diameter of Wheel: 13'', Iron hub dia.: 6.73'', Width: 3.4'' , Bearings: 5/8", Axle Bore Length: 2.2". Product Marked Load Capacity: 275 lbs/wheel, Maximum Load Capacity: 400 lbs/wheel. Suitable for wheelbarrow, hand truck, trolley, boat dolly, garden utility wagon, garden scooter, hose reel cart,etc.,Puncture Proof & Shock Balanced: This solid tire doesn't need to inflate, its premium material and extra thickness prevents puncture or flat, suitable for all kinds of road conditions such as sand, gravel and rugged roads. Heavy-duty ball bearings and steel rims ensure good traction and vibration damping during the ride, more stable and comfortable.,Anti-Slip & Wear Resistance: The rubber replacement wheels is made of tough polyurethane material for more wear resistance, more durableand. Tire tread pattern increases friction and enhances slip prevention.,Explosion-Proof & Eco-Friendly: The internal explosion-proof design creates an airtight seal in the event of a flat tire, safer for operators. Used the carbon black pellet technology materials are more eco-friendly, no irritating odor than others.,Note & Sincere Service: Please check your old tires for fitment before purchase. These wheels are suitable for dynamic loads, not for static loads, please remove heavy items after using the cart. And it is not applicable to highway. If you have any questions after purchase, please feel free to contact us, we will glad to help you solve it.