You mention a 12 volt air compressor. I just bought a Viair 400p unit. It is the brand that the off road guys recommend. It will pump a tire up to 50 psi very quickly. Proper air pressure is very important for your tires at highway speeds. They have several models of this Viar pump. I find the 400p is very strong and it’s what I recommend. I ordered mine from amazon for $179.00.