The boat weighs just over 100k with engine etc.
The suspension units are 250k rated.
I weigh 14.5 stone and can jump up and down in the boat on the trailer without the thing bending!
All the weight is over the wheels and the balance point is spot on.
The weakest point is the neck (where the hitch is) and i can stand on that while its hitched up and it will give a bit but just bounces!
My brother has got a tender he wants taking out of the water soon that weighs alot more than my sib! so that will be the test.
The thing is quite flexy without the sib on but as soon as its on and strapped down it actually strenghthens the whole thing if you think about it!