Swop Pajero Wheels/ B/F Goodrich Mud Tyres For All Terrain Wheels & Tyres -

I have BF Goodrich Mud Terrain T/A 31X10.50 R15 LT Tyres on 6 stud / 6 Spoke Alloys.2 are 6mm Tread/ 2 are 10mm tread/ and 1 is new.I am looking for a straight swop for All Terrain Tyres on Alloys,with decent tread,not bald or barely legal.