... :DOT,ECE,CCC,ISO, 5. (1) Sizes and Specification: All Steel Radial Truck Tube Tyres/Tires: 8.25R16 8.25R20 900R20 ... 1000R20 1100R20 1200R20 1200R24 etc. All Steel Radial Truck Tubeless Tyres/Tires: 11R22.5 12R22.5 13R22 ... and excellent service Certification: DOT,ECE , ,CCC,ISO, High quality steel wheel for agriculture machine and tractor