So I was getting 18-19mpg's with my 305's, but towing and city mileage were horrible. Went back to the stock wheels and 265's that came with the truck when I bought it and got about 21 highway/16 city/14 towing...then came time for new tires and I needed to max out my mpg's so I went with stock 245's. I put on some Grabber HTS's and now run 2000rpm at 65mph and have dropped to 17mpg highway :WTF Don't know what the towing economy is yet. Is this normal? I thought the 245's got u the best results?? What rpms/mpg's are u guys seeing with 245/265's ???