Material : Isobutylene Isoprene Rubber which is better in air tightness, elastic damping and aging resistance than natural rubber.
Size 200x45 means that the tube is 200mm x 45mm, and in inches 8 x 1 1/4
Valve Stem: Angled Stem. Recommended Charged Pressure: PSI 28 (Please note that you‘d better inflate according to the recommended charged pressure of the inner tube. Do not inflate according to the pressure marked on the tyre, otherwise the tire will burst easily).
Fits the A-Bike city, and the motorized version as well
This inner tube is made of isobutylene isoprene rubber, which is better in air tightness, elastic damping and aging resistance than natural rubber