thats the hard part really isn't it i've had the BFG AT for 100000km now and they're pretty much stuffed and its either $400 for new 33x12.5 for KM2 or $300 for fed 35x12.5 so i don't know what would be the better deal for me with 70/30 road/track work, and have you tried them in sand at all?? or has any tried them in the sand??