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LEAS Anti-Snaking System - Trailer Stabiliser

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The LEAS stabiliser will keep you safe in critical snaking situations, ideal for all caravans and trailer chassis with a handbrake cable.

  • Applies caravan/trailer brakes in critical snaking situations.
  • Suitable for any caravan or trailer up to 3.5 tonnes.
  • Peace of mind while towing especially in adverse weather conditions.
  • Stand-alone power supply from towing vehicle avoids overload on existing plug.
  • Designed and manufactured in Germany.
Delivery: 3-5 Working Days
£499.00
I would like Conrad Anderson to fit this item (+ £100.00)

If you have ever experienced a 'snaking situation' while towing a caravan or trailer you should see the benefit of the LEAS stabiliser.

The LEAS stabiliser works on the same principle as ESP (Electronic Stability Assistance) on a car, by applying controlled braking in critical situations. It is an electro-mechanical device, which detects the start of a snaking movement and immediately applies the brakes of the caravan or trailer.

Unlike other anti-snake devices, which work as constant friction dampers on every movement, the LEAS Stabiliser applies the caravan/trailer brakes only when lateral movement is detected. This is performed using the patented electronic movement sensor and motor assembly.

Sudden hard braking, gusting winds and sharp steering, even at slow speed can cause snaking movements, which can result in jack-knifing or rolling.

The LEAS stabiliser is very popular in Germany and comes recommended by the German consumer association "Stiftung Warentest", the German test institute "TUV-Rhineland" and the German auto club "ADAC".

General Description

The LEAS comprises a spring actuator with actuating motor(1), the corresponding sensing control(2), and electronic control unit (ECU). The spring actuator and actuating motor are attached by means of two U-bolts(3) to the front of the A-frame of the trailer. The cable at the end of the spring actuator is clamped under slight tension to the main brake rod of the trailer. The actuating motor is enclosed in a protective housing. The ECU is installed transversely and as far rearward as possible either inside or outside the trailer. It is connected to the actuating motor by means of an electric cable(4). Supplied is a buzzer(5) to be fitted in the tow vehicle. It emits a continuous buzz when the system has deployed and the trailer brake is applied so alerting the driver.



Power is supplied by the towing vehicle. How this is done is described under item 2.5. The sensor unit (ECU) continuously monitors the dynamic stability of the trailer. As soon as the trailer becomes unstable (i.e. snaking occurs) the electronic control unit gives a signal to the actuating motor to release the spring and thus activate the braking system of the trailer (with 20% of its full braking performance). The car/trailer combination is stretched and reverts to a stable condition. The acoustic warning signal ensures that the driver knows that the braking system has been deployed by the LEAS unit.

After snaking has been brought under control, a cam on the actuator is rotated back into its stand-by position by means of the electric motor and this reloads the spring ready for further use. The process is then complete. The LEAS system is unable to work if the brakes of the trailer have faded. It is then inoperative.