The Lezyne pressure over drive is an innovative floor pump with an integrated system designed to seat tubeless tyres. 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. Accurate analogue gauge. Durable steel and aluminium construction with stylish wood handle. Extra long, nylon-reinforced braided hose. Presta and Schrader compatible ABS1 Pro chuck.

When using the Lezyne Pressure Over Drive floor pump as a regular pump, air has to fill the chamber before it will start to fill an empty tyre/tube. This may take numerous strokes before the tyre/tube begins to inflate. When topping off a tube/tyre that already has pressure in it, the chamber will have to reach the same pressure the tyre/tube is at first before it will begin to inflate it further.