I found some 35x12.5x20 mud grapplers on craigslist w/ rims for 400. They have about 1/4 tread but for 400 i might as well. My question comes with fitting and MPG. Its a 2002 tundra v6 5 speed. Right now i have a 3/1 with 31's and get about 15 mpg driving it like its my last day on earth. Im wondering how many MPG wi should expect and how they will fit. i know ill have to do a good deal of trimming but with a 0 offset will they even fit?