Well, there's a lot of varying and personal preferences on this issue - as I'm sure you will see as the replies come in. Personally, I have a big beef with the factory recommended 55 psi for the fronts. It's a BS recommendation to "soften" the ride characteristics at the expense of the tires. I ran my original Firestones at that pressure and the weight of the engine/front end ATE THOSE PUPPIES UP! You're absolutely correct about the rear pressure, 80 psi is only required when loaded and will quickly "crown" your tires (wearing the center of the tread prematurely) if you run around empty at that pressure. I've settled on 65 psi all around and I adjust my rears accordingly when carrying weight in the bed or pulling my utility trailer. So far, my Dunlop Radial Rovers have worn evenly and performed great at that pressure. Unless you want cupped/scalloped/prematurely worn out front tires - DO NOT run them at the recommended 55 psi!