Cummins ISB 6 Cylinder 5.9 L Diesel 200 hp Engine, Allison 2500 Automatic Transmission, 12000 lb Front Axle, 21000 lb Rears, 5.86:1 Axle Ratio, 32000 lb GVWR, 11R22.5, Spring Suspension, 152 in Wheelbase, Mechanical Broom Sweeper, Dual Controls, Front Spray Bar, 96 in Under Body Broom, Gutter Brooms, Water System .