First, you should ask yourself why you want to know the support load on the trailer, caravan, etc. at all and how exactly you have to know them. There is now potential customers exactly need to specify on the kilos to set off with a clear conscience can. For these customers, I would say: Buy a more expensive, good balance! Which? No Idea !! I am not one of those people. Mir reaching a specified +/- 5 Kg. => I have balanced the support load of our caravan with a bathroom scale and a sawed-off broom stalk to 70 Kg. Then I'm a piece of highway hazards to determine how well the trailer behaves with this nose weight behind my car. When I found this nose weight for good, I have asked myself this red, cheap- plastic nose weight scales under the drawbar and painted with Edding ringsrum a line and wrote the number to Kg. (Below 15 kg of more, as to the accuracy of this scale.) If I now on vacation, before returning loading the caravan, I imagine the cheap red plastic part back under the drawbar and loading the caravan so it about again in this vertical load comes. And when I have 5 Kg, more or less, the trailer behaves much different behind the car. For those where there is sufficient similar imprecise => this scale is the couple and a 3-star value rating, but no more!