Alko AKS Stabiliser 50mm 3.5t high rise towball.
The ALKO “AKS” range of stabilizing coupling heads is fitted as original equipment on most European caravans
and some Australian and New Zealand caravans as optional equipment, where a 50mm towball is used.
The effective suppression of snaking movements of the caravan or trailer is achieved by 4 special friction pads
which surround the towball and resist rotation.
AS A RESULT OF THIS DESIGN IT IS IMPERATIVE THAT THE 50mm TOWBALL USED ON THE TOWING
THE VEHICLE IS UNABLE TO BE LOOSENED BY ROTATION.
Most tow vehicles within Europe use a rigid forged 50mm towball which is bolted to an attachment on the
vehicle towbar. The fixing and retention of this style of towball are not affected by the friction clamping of the AKS
However, most tow vehicles within Australia and New Zealand use a conventional towball which is most
commonly fixed through the towbar tongue and retained by a washer and nut. This type of towball, when used in
conjunction with an AKS style coupling head could become loosened by normal vehicle/caravan rotation during
To eliminate this ALKO has developed, using an Australian Standard 50mm towball (with flats on the ball
flange), a retention plate that stops the rotation of the towball during operation.