Through trial and error, I found that this tire inflator is a total waste of money .Despite following the instructions I couldn't get it to inflate my motorcycle's tire to the desired pressure. The cheap rubber construction feels flimsy and prone to damage, and the nozzle doesn`t fit properly onto the valve stem, causing air to leak out. The only positive is that it's compact and easy to carry around. Save your money and invest in a better quality tire inflator..