『SPECIFICATIONS』 2 packs 20" tires made of high-quality polyurethane material tires. Flat free Airless tie diameter 20", axle bore 3/4", tire width 1.73", Centered Hub 2.44".,『MULTI-DEVICE COMPATIBILITY』 The 20 inch x 2 pneumatic replacement wheels are widely used for 3/4" ball bearings Wheelbarrows/Garden Trailers/Roofing Equipment/Yard Trailers, and so much more! (Not for highway use),『QUALITY UPGRADE』 Flat free tire wheels are made of durable Polyurethane material with a load capacity of 200 lb. Airless tires perform like air, no need to inflate, can prevent from getting punctured or deflated. Keep you away from the trouble of inflating tires. And don't need to visit a professional tire shop anymore,『NEW GRIP DESIGN』 The straight grain tread design of the replacement tire enhance friction, increases its bearing, steering power, shock-absorbing performance and non-slip capacity greatly. (Check your axle dimension and existing tires sidewall in order to match your carts),『24 HOUR SERVICE』 If you have any questions during use. Don't hesitate to contact us directly via our customer service team. We will answer your questions and requests in a prompt manner.