Unusual Trailer

davenbex

Hi, while on holiday in Portugal we saw a motorhome towing a trailer that followed the direction of the motorhome when it was reversing so no need to counter by turning the wheel.  The owner said the trailer was from Germany or Holland, I can't remember
which.  Does anyone know about these trailers ie where they can be purchased or what they would be listed under/called, it was amazing but I can't seem to find them anywhere. Thanks