Inner Tube Size: 650R16,750R16,825R16,825R20,900R20,1000R20,1100R20,1200R20,1200R24. Inner Tube1.Size: 650R16,750R16,825R16,825R20,900R20,1000R20,1100R20,1200R20,1200R24.2.Certificate: ISO9000, CCC.Please contact me for more information and our quotation. Inner Tube of Truck 825R20