Talking with outlaw other day, he's a grey nomad, ok.
The story goes he has a mate who had some trouble.
Tow bar couplings adjustable height apparently shouldn't be using Hi tensile bolts !!.
the push pull motion a trailer places on these can simply snap/shear a tensile bolt if used here.
where as a normal bolt will have some give to bend instead.
best I can explain it, seeing I heard it 3rd hand.
anyone have any experience with this ?
after some input please