This pump is a piece of junk.  Even though it is supposed to be a "high volume" pump, it took just as many strokes to add 5 psi to the tire on my SUV as the piece of junk bike pump I had gotten from Wal-Mart prior to this one.  On my second use, the hose started leaking considerably at the base of the pump.  I used a cable tie to seal the hose to the base of the pump, and the hose burst.  Stay away from this- don't understand why it has so many positive reviews.