... size :400-8 2,Natural rubber 3,Valve: TR13 4,Weight:400g natural rubber inner tube 1,Model size :400 ... -82,Material : natural rubber 3,Valve: TR134,Weight: ... we can produce motorcycle tyre ,motorcycle tubeless tyre ,motorcycle inner tube ( natural rubber or butyl ) , If you have the specific ... 300/325-17,300/325-18……. natural rubber inner tube