... Foam Color: Black, Blue, Red, Green, Grey, Yellow etc. 4.10/3.50-4" Flat Free Hand Truck Tire Tire Material = Solid Polyurethane ... etc. Often referred to as a 10" tire, the 4.10/3.50- 4" tire is one of the most common tires for ... more. It comes standard with a 2.25" offset hub, but we also offer 3" and 4" centered hub lengths for casters and ...