Portable air compressor

I guess if you are stuck on the 12v models the 450 would be the way to go. I on the other hand would stay away from 12v models and go with a 120v plug in model. I have used a Fini air compressor for many years, on 19.5 to 22.5 tires. It does take some time to get up to 100psi but I believe you will be happier with a 120v unit. I got the Fini at one of the big box stores about 6 years ago.