2025 MACK, MD6, Medium Duty Trucks - Cab & Chassis Trucks, CUMMINS ISB6.7, Automatic, 2025 Mack MD64. ISB 6.7 Cummins with Allison 2500 RDS transmission. 10000 front and 19000 rear axles, air ride suspension. 4.88 rear ratio and 206 wheel base. Has 255/70R22.5H front tires, and 255/70R22.5 rears., 300 Horse Power, Air Ride Suspension, Wheels, 206 Wheel Base, , Axle, 4.88 Ratio, , VIN 1M2MDBAAXSS014645