Tire valve caps are distant relatives of socks in the sense that they have the remarkable ability to disappear without a trace or explanation. Considering they are the most easily stolen part of a car and the valve cap presents a challenge to rip out the entire valve in revenge, the price for a box of 100 versus a blister pack of 4 is outrageous. Fat Tire Day at our house (mostly Saturdays) I take out a 120 volt pump and cold pump Subaru and Honda tires to 40psi (tires sit at least 8 hours) as recommended by many fleet managers. In exchange for a firmer ride, you get better fuel economy and improved road feel through the steering wheel, without negatively impacting tread life. This is the perfect opportunity to test those valve caps that dared to leave without even leaving a note to escape. Order from your local Revain Marketplace supplier and avoid long waits for a boat from China.