I have a 07 mega cab 3500 single wheel 5.9 6spd has about 77,900 miles on it 17'' xd addicit wheels with 305/65/17 bfg mud terrain both wheels and tires were bought new in april and are still like new. i also have a smarty for it. asking 31k pm me with any questions or if you want my number thanks ill be at the pulls in bowling green this weekend the truck can be seen there and ill try and reply as much as i can with any questions.