Upgraded with a Tier 4-Interim, 32.6-horsepower Kubota engine, the BW100AD-4 tandem vibratory roller has a Smart Drive steering wheel. With smaller wheels, the machine gives the operator a clear view of all indicator controls. The lateral sliding seat on the machine allows a better view of the drums. The compactor delivers up to 8,350 pounds centrifugal force per drum and a maximum frequency of 4,200 vpm. The rear drum can be offset by 1.6 inches in either direction.