The drive system has four-point contact configuration for maximum stability (N 20). The maximum speed is 10 km/h laden and 12 km/h unladen with automatic regenerative braking as traction butterfly is released to neutral or opposite direction of travel is selected. Electromagnetic braking initiated by the emergency stop button acts on the drive motor, proportional to the load carried. There is also a High-performance option with a five-point contact configuration for optimum stability (N 20 HP/N 24 HP). Electronically controlled, hydraulically suspended active castor wheels automatically select optimum ratio between stability and traction for constant ground contact.