2009 NATIONAL, NBT50, Cranes - Boom Truck Cranes - Mounted, , , An EXCELLENT NBT50-102 National Crane mounted on a 2009 Peterbilt. This unit has 4.56 rear axle ratios.This unit will drive 62MPH. Call (330)478-9494 and ask for Rich if you have any questions or to set up an appointment to see this truck., Horse Power, Suspension, Wheels, Wheel Base, , Rear Axle lbs, Ratio, , VIN