I see the op is in Darwin. I know what you are up against. Tyre sellers that won't budge below $495 each for Bfg muddies.

Delamination is serious. I'm sure someone has a good story here about the damage it can cause. Retreads are high candidates for Delamination in the top end.

Me personally, I went for summit mud hog. 1350 delivered for 5. (freight $250). Almost half price for 5x Bfg muddies at 495 ea. Of course time will tell whether these are any good up here.