OK, my roomate and I both have F-350s. I have a fat girl (dually) and he has the single axle truck. Both 4 door 8ft beds. We went out to Cowboys (a bar) one night and one of the regulars bought a Dodge 3/4 ton diesel. Nice truck too. Anyway, big truck cause for Sh_t talking. After a few hrs, my room mate and I left but we were right behind each other and let me tell you, that engine don't give a **** about those tires. We lit it up blowing black smoke and as soon as we straightened them up, the police was coming up the road but the opposite direction. He hit me on the phone and said he saw brake lights. Time to go. So we stumped it. Man we was haulin azz and pulled into a certain resturant. We grabbed the GPS and that damn thing said we got up to 137MPH. I was like Bull Crap. But is has been correct on everything we tested it on. C'mon now. will these truck really go that fast. Oh by the way, we got away from the cop. He flew by the resturant and never saw us. what a sigh og relief.