... Butyl inner Tube motorcycle inner tube natural rubber ,butyl tube rubber 35% 1)Good gas tightness2)Superior quality and competitive price3)Timely delivery4)OEM Accept5)Inner tube ... manufacturer of motorcycle tyres&tubes and rubber wheel tube with the natural and butyl inner tube in China. The sizes as follows: ... 4.50-10,........300-16,300-17,300-18,275-17,275-18,250-17,250-18,225-17,225-18,300-14,300- ...