I'm cutting and pasting this from a previous post of mine:
First the disclaimer. Other than as a customer, I have no affiliation with this company. We are fulltime, movin' around RV'ers for 13 years. A 12V compressor capable of dealing efficiently with 80lb tires, while not essential, has proven useful on many occasions, more specifically the top-offs engendered by changes in altitude and temperature. 9 years ago, we purchased a Master Flow unit that served us well for 3 years until I dropped it off the side of our truck and the intake housing cracked in half. I wrote the company asking about a replacement part. (It would have been a 10 minute switch-out..tops) I explained what had happened and in no way suggested that it was anyone's fault save my own. 4 days later a brand new complete compressor was delivered, no questions asked. We're still using it and kept the old one for parts (which we've never had to use). THAT, folks, is customer service! I offered to at least pay for the replacement part. Their response was: "If you have the chance, tell others about us". I have had that opportunity and just now did it again.
That said, this is a rugged unit that weighs all of about 5lbs that will completely air a flat 225/16 to 80 lbs in 5 minutes. I can't say enough about the product or the company. And you have to understand that this comes from someone who believes that 99% of everything marketed is ****.