Butyl and natural rubber inner tubes are on sale. we supply butyl tube and nature rubber tube for: trucks: 9.00-20, 10.00-20, 11.00R-20, 12.00-20, 12.00-24, 14.00-24 OTR tire tube: 17.5-25, 20.5-25, 23.5-25, 26.5-25, 29.5-25, 18.00-33, 16.00-24, 16.00-25, 15.5-25, 13.00-24, 18.00-25 and so on.