Bike inner tube 20x2.125 1.High rubber content 2.Full range size 3.Prompt delivery 4.Competitive price,Superior quality Bike inner tube 20x2 ... to our factory.1.Motorcyle tyre size; 325-16,300-17,300-16,300-18,275-14,275-17,275-18,250 ... -10,100/90-10,300-8,400-8,400-12.2.Inner tube size:185-17,200-17,225-17,250 ... -14,275-18,300-17,300-18,325-16,325-18,110/90-16,275-17,350-18,400-10,400/450 ...