2 Pack of 8x1 1/4 200x45 Inner Tubes with Angled Valve Stem Replacement for A-Bike Folding Bike Jetson Beam Electric Scooter Butyl RubberBrand new replacement 8x1 1/4, 200x45 Inner Tube with angled valve stem, Hand-measured inner diameter is about 14cm/5.5 inches. It is the perfect replacement inner tube for 200x45 tires of A-Bike Folding Bike Jets..