Marathon Industries 00010 4.10/3.50 -4-Inch Flat Free Hand Truck/Utility Tire, 2.25-Inch Offset Hub, 5/8-Inch Bearing, 10-Inch Tire Diameter
Eliminate Downtime, Marathon flat free 4.10/3.50-4-Inch tire is the most common size tire for hand trucks and other small equipment. No flat tires have the same bounce, feel, cushioning, and performance as a regular air-filled or pneumatic tire.  They are also non-marking and will not be affected by ozone or UV rays.  Airless Tires are made of lightweight, solid polyurethane foam and are guaranteed to never go flat.  Mounted on a 4-Inch diameter steel rim with a 2.25-inch off-centered hub and 5/8-Inch ball bearings.  3.3-Inch tire width with an overall diameter of 10-Inches