English dragonboros that can be used on small diameter vehicles.
Original English dragonbolo that can be used for bicycles with small tire diameter.
How to inflate the air:
1. Pinch open English dragonboro gold with your finger, and insert the tire tube valve in the direction of the arrow.
2. Connect English dragonboro gold and tire tube valves.
Please lightly pump it first to make sure that air will enter and begin pumping.