And to finish the question - “...with correct load rated tyres that will fit under the wheel arch?” I can’t answer but isn’t the suspension bad enough?
So you mean the 265 80 16 BFG mud terrain tyres in my shed won't fit? That scuppers that idea then. Thanks for the advice - you've saved me a load of grief ;-)
265/80x16 tyres would be a bit tight on 17” wheels even if you could get them to fit under the wheel arch.