The lezyne classic over drive floor pump oversized machined steel barrel and piston with aluminum base high volume maximum flow design efficiently inflates large diameter tires and can quickly seat tubeless setups large 25 inch gauge optimized for low pressure fine tuning extra long high strength oversized hose with aluminum couplers durable painted finish with varnished wood handle high volume abs2 equipped lezyne classic over drive floor pump features large 25 inch gauge opti