9x3.50-4 PU Wheel & Tyre 10 Inch Solid Flat Free 20mm Ball Bearings Garden Cart
The size 300-4 or 3.00x4 or 300x4 or 260x85. Motorbike. PU (Polyurethane) is an injected moulded puncture proof style without inner tube. The tyre section on a PU wheel cannot be replaced, you simply buy a new wheel and tyre complete.