Lezyne Digital Pressure Over Drive: ABS-1 Chuck Black. Innovative floor pump with an integrated system designed to seat tubeless tires. A secondary chamber can be manually pressurized and the stainless steel foot-lever releases the compressed air. This discharges a strong continued blast of air that quickly seats tubeless systems. Equipped with super accurate custom digital gauge. Durable steel and aluminum construction with stylish wood handle. Extra long nylon-reinforced braided hose. Presta and Schrader compatible ABS1 Pro chuck.

When using the Pressure Over Drive as a regular pump air has to fill the chamber before it will start to fill an empty tire/tube