... 2.long-serving life 3.professional formula 4.reasonable price Bicycle inner tube 20x1.75 Our factory is professional in producing ... capacity:200,000 pcs/monthInner tube material: natural rubber/butyl rubberProducts:inner tube,natural rubber tube,butyl rubber tube,tyre,motorcycle tyre,rubber wheel,solid wheel,foaming wheel ... /2.125 26x13/8 26x1.75/1.9528x1.75 Natural bicycle tube 20x1.75