Add ballast to your tires using a Traveller 3 pc. Air/Water Adapter Kit. Made from durable nickel-plated steel, this air/water adapter kit can be used with any standard garden hose, allowing you to fill tires with liquid as needed. It has a rigid female end as well as a swivel female end. A button bleeder valve makes pressure release simple. Plus, this air/water tire adapter kit comes with a 5 mm O-ring and a 1 cm O-ring.