Detroit 12.7 Series 60 380HP 10 Speed Eaton Fuller 12,000# Front Axle 40,000# Rear Axle Air Ride Suspension 3.55 Axle Ratio 174 WB 11 x 22.5 Front 60% 11 x 22.5 Rear 70% stationary 5th wheel,2-115 Gallon Aluminum Fuel Tanks Air Conditioning Cruise Control Stainless Mirrors Aluminum Front Wheels Outside Rear Aluminum Wheels Heated Mirrors Truck was single axle, converted to tandem axle Empty Weight: 15,820#