Review on 🔧 Efficient Tire Deflator Kit: Adjustable, Universal Pack of 4 for Optimal Performance by Jonathan Yang

Fine adjustment requires a lot of effort. If you want your tires to be within +/- 0.5psi, you should use a pressure gauge. However, the price is right and it really saves time. In order to perform at your best, you have to be consistent. Start in a corner and work to install the deflators, wait a specified amount of time, and then remove them in the same order you installed them. This will give you the most consistent results. Finish off with a pressure gauge so all tires are the same. Calibration: When you receive your deflators, open them up and make sure there are no chips inside (I found chips in one of mine). I lubricated the inner piston and spring with some petroleum jelly, which improves consistency and keeps the spring from sticking when adjusting the deflator. They are fairly easy to adjust to +/- 1.5psi in 30 minutes. If you need higher accuracy, the calibration time increases exponentially.