I hope it's ok to ask on a "sticky" thread but because I'm coming off a Suburban when gas was $3.00+ I still have a concern over gas mileage. How much difference in MPG does an aggressive tread affect? I don't do a whole lot of off road (I do every weekend)but when I do, 4x4 is definitely needed here in the northwest as much is mud because it rains often with snow in winter. I'm thinking of going to Costco. Here's their tire selection: Costco tires - If you don't mind, what are your opinions? Metric tire sizes confuse me. I'm used to inches. *edit - I hear these tires are great!

*just bought a stock sr5 2002 4runner w/16" - former '91 owner