... by skilled technicians, delivery time assured, competitive price and fine quality, which makes our tubes very popular around the world.2 ... motorcycle butyl and natural rubber inner tubes are available. Common quality, superior quality. Sizes: 1.85-17, 2.00-17, 2 ... ,motorcycle butyl inner tube and natural inner tube 2.Quality certificate:ISO9001,CCC,SONCAPKindly pls check the following detailed ...