Lezyne abs speed flex hose presta pump spares the lezyne abs speed flex hose presta is the combination of three lezyne features to make one of the most versatile presta valve hand pump inflation hoses one end threads onto the presta valve for a secure and air tight connection that prevents damage during inflation the other end is a presta only slip fit system connection for fast valve engagement this hose offers speed and flexibility the speed flex hose is also equipped with the air bleed