The Dynapac CC 522C combination roller has an operating weight of 25,800 pounds. The machine's front drum is 77 inches wide and 55 inches in diameter. The four-tire module at the rear is 75 inches wide. Powered by a 125-hp Cummins diesel engine, this "combi" roller has dual amplitudes and operates at a frequency of 3,060 vpm. Centrifugal force is 31,050 pounds in high amplitude, and 15,750 pounds in low amplitude. Both the drum and wheel module propel the roller, which has a maximum speed of 7 mph.