... Motorcycle 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:30 ... .50-10,........300-16,300-17,300-18,275-17,275-18,250-17,250-18,225-17,225-18,300-14,300-12,325-16 ... ,325-18,350-8,90/90-10,90/90-18,400 ...