... professional in producing motorcycle/wheelbarrow tyre and tube with high quality which reached world-class ... tube material: natural rubber/butyl rubberProducts:inner tube,natural rubber tube,butyl rubber tube,tyre,motorcycle tyre,rubber wheel,solid wheel,foaming wheel,rubber ... ,400-8,400-12 etc.2.Motorcycle inner tube size:185-17,200-17,225-17 ... inquiry. car butyl/natural rubber inner tube 175/185-14