The lezyne pressure drive pump is different in that instead of the usual right angle head mounted on one end the lezyne pump features a unique removable hose that is conveniently stored within the body just remove the hose from one end and screw it on to the other and you39re ready to go the screw on head yields a secure connection at the tyre and even when there isn39t much valve showing the flexible hose means you can pump away without the fear of bending the valve core this bike