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Wirtgen’s Hamm HD+ Asphalt Rollers (HD+ 120 and HD+ 140) are articulated tandem rollers, with respective operating weights of 13.2 and 15.4 tons, and respective drum widths of 78 and 84 inches. They feature an unusually large operator’s platform, perfect visibility conditions for the operator, and impressive performance data. The HD+ 120 and HD+ 140 rollers replace the existing HD 120 and HD 130 rollers in the Hamm lineup. Each size compactor is available in three models: the HD+ 120 or 140 VV, with conventional vibration in both drums; the HD+ 120 or 140 VO, with vibration in the front and exclusive Oscillation compaction in the rear; and the HD+ 120 or 140 VV HF, offering high-frequency vibration to 4,020 vpm. Frequency and amplitude can now be controlled independently on either drum, providing increased flexibility in the roll train.