Cummins X15 450HP T4f diesel, Eaton Fuller 10 speed, 20,000 lbs. front axle, 44,000 lbs. rear axle, 64,000 lbs. GVRW, 244" WB, 4.63 rear ends, 425/65R-22.5 frt tires, 11R22.5 tires, double frame, Hendrixson air ride suspension, diff lock, sliding 5th wheel plate, A/C, cruise control, heated mirrors, power mirrors, air ride seat, air ride cab, power windows, block heater, Namco split shaft pto. 140" Back of Cab to Center of First Axle, 168" Back of Cab to the Center of Both Axles, 221" Back of Cab to the End of Frame.