10 Speed Transmission,MP8 Engine, 12,000 Front Axle Capacity, 40,000 Rear Axle Capacity, 176" Wheel Base, Tandem Axles With 22.5 Tires, 5th Wheel, Day Cab, Air Ride Suspension, Dual Tanks With 210 gallon capacity, Standard Interior, White Exterior, Aluminum Front Wheels, Aluminum Outer Rear Wheels.