Is this a correct assumption

Rocky, I don't know about you but I tend not to carry passengers in my caravan.

You may not but I’m happy to pick up hitchers @ £10 a pop👍🏻😊

Eriba has the right approach. It's like a lever so making it shorter gives negative mechanical advantage, the weight gets heavier closer to the axle

But going by the 7% of the caravan's weight will often exceed the permissible towbar limit, especially in the case of heavier caravans. Many car manufacturers specify a limit of only 4% of the maximum permissible caravan weight for the towbar because that's what the regulations demand.

I did it & lived to tell the tale😊, no old Bill pulling me over no hassles nor accidents. I know it’s a shocker but some folk can think outside the box without freaking over an nth degree👍🏻

You are right to assume that the jockey wheel will show a different  weight than the hitch. However, it’ll be higher, not lower. But in the grand scheme of things you need never guess again and you can leave your scales at home if you buy a proper nose weight scale. Buy a Milenco one and you’ll never need another. It’ll be £35 we’ll spent.

I've got a proper nose weight gauge but find it is not so accurate as the bathroom scales. Once I have checked the weight at home before a trip the scales stay at home as everything is put back in the caravan in it's original place whilst we are away so the weight balance shouldn't change.

We’ve had cheaper, and inaccurate nose weight gauges in the past, which is why I’ve specifically named Milenco, which we once checked against our bathroom scales.

I think Lutz is just pointing out that the vehicle and towbar spec overules the guideline. Should an accident occur exceeding the design weight could result in invalid insurance.