Power Tank Monster Deflator Valve, Single By using these deflators w/ their quick release and larger diameter, they cut the deflation time in half! You can take a 35 tire from 0-30psi in a little over a minute. Also it only takes 25 seconds to go from 30psi to 8psi on the trail. They even include their only custom air chuck. So you like the idea so much you want a Monster Valve for your spare too. Then pick up one more single valve.