The HD O130V is the largest asphalt compactor in North America to incorporate exclusive Hamm Oscillation Technology. This 84-inch-wide, double-drum roller has an operating weight of 29,277 lb. with oscillation in the rear drum, and conventional vibration in the front. The rear drum has an oscillation frequency of 2,160 to 2,520 vpm, and the front with vibration frequency 2,520 to 3,000 vpm.