Martin Wheel 408RBPU32 Wheelbarrow Flat Free Wheel With Universal Hub 4.8 By 4/8 Inch Tire 16 Inch Dia Tire Ribbed Tread: Wheelbarrow Miscellaneous Parts (098663063739-1)
Jackson® FFTKBCC | Mallory Safety and Supply
Flat-Free Wheelbarrow Tire, 15.5 in. - Wilco Farm Stores
Gorilla 16 in. Flat Free Universal Wheelbarrow Tire GTNF-16WB - The Home Depot