Quote Originally Posted by bacicat View Post
Ink the 10% ball weight bit is a throw back from decades ago when most vans weighed under 1500Kg. A dual axle 20 footer built in the 70's comes in at thuis weight and my single axle 75 Franklin 16' doesn't crack 1300Kg. In these instances, 10% is fine - 1 run about 130Kg ball weigh which the 101 or the Captiva handles with ease.

In Europe, 5 to 7% is a common ball weight, so as long as it's loaded correctly, there is no need to have more than 150Kg on the ball for all but the biggest and heaviest vans.

Dare I say it - but on the Caravanners forum, there is much discussion about this and there are some links to good articles that show that 10% isn't always correct.
I wonder what sort of tow ball weight I've got with this:


It'd be close to 10%.
I would use about the 10% value but not more than the rated tow hitch loading.