The Ammann ASC250D is a static smooth drum roller designed for high-efficiency compaction in soil and asphalt applications. It features a front drum diameter of 67 inches (5.6 ft) and a drum width of 88.2 inches, delivering a static linear load of 439.1 pounds per inch. The machine produces powerful centrifugal forces of 76,435 lbs at high frequency and 103,412 lbs at low frequency, with nominal vibration amplitudes of 0.1 inch, operating at frequencies of 28 and 34 vibrations per minute. Powered by a QSB6.7-C220 engine, the roller provides a net power output of 208 hp (155 kW) and has a fuel capacity of 107 gallons, enabling long working intervals. It has an operating weight of approximately 55,843 lbs, ensuring effective compaction performance with robust static weight. The maximum speed is 6.3 mph, suitable for various jobsite conditions. Dimensionally, the ASC250D measures 21.6 ft in length, 8.3 ft in width, and 10.8 ft to the top of the cab, with ground clearance at 19.7 inches and a wheelbase of 10.8 ft. It rides on 23.5-25 tires and benefits from a hydrostatic powertrain and a balanced drum for uniform compaction. The design emphasizes stability with a low center of gravity, ideal for extreme terrain and diverse compaction needs. Optional features may include vibration frequency adjustments and compaction measurement systems for optimized performance.