GRANITE GU713, Heavy Duty Trucks - Dump Trucks, Mack MP8, 13 Spd, A nice 2010 Mack tri-axle dump truck with a 19.6ft J and J Aluminum body. The chassis has 500,084 on the miles currently. The body has a swing arm tarp system, 20k non-steerable lift axle, coal door and has been well kept. Call today for more details., 485 Horse Power, Hendrickson HMX460 Suspension, Wheels, 260 Wheel Base, 11R24.5, Tri Axle, Ratio,