DVR 85 Articulated Vibratory Roller:(Double Drum, With Operator Seat) Operation Weight : 1570 kg Static Lineer Load : 9.4 kg/cm Drive System : Hydrostatic Walking Speed : 0-7 km /h Gradeabilty : 40 % Service Brake : Hydrostatic Parking/Emergency Breake: Negative Vibration System : Hydrostatic Centrifugal Forc (Front- Rear) : 10.5 kN Frequency : 50 Hz Nom. Amplitude : 0.5 mm Steering Type : Oscil Artic. Steering Method : Hydrostatic Steering Angle (+/-) : 30 Degrees Oscillating Angle (+/-) : 10 Degrees Drum Diameter : 580 mm Drum Width : 860 mm Drum Thickness : 10 mm Engine Options : Lombardini Diesel 23.4 HP Water Cooling Hatz Diesel 22 HP Air Cooling