Tiron R-4 TIRE 12×16.5 12-16.5 305/70-16.5 OE some Yanmar SA model tractors. For Compact Garden Tractor. 6Ply Tube-Less (load range “B”). FOR: Compact Tractor, Riding Lawn Mower – Skid Steer – Custom Builds. Maximum Weight Carrying Capacity. NOTE: NHS N on H ighway S ervice Tire. Original Equipment on some Yanmar Tractors. CUSTOM BUILDERS AND ALL DEALERS WELCOME.