My last two sets where KO's and the only difference I could see was added tread to the side walls.
The tread pattern doesn't expel water very well at all.
I can compare this to Yoko's AT that where fitted standard to pajero's which I than fitted the two BFG AT too. But nothing drains like a MT.:D
I still think there over priced for a tyre so old in design. (must be 30 years or more)Most tyres get cheaper as the production run continues. Such as Dunlop Adventures or Dessert duelers.

