How about these tires.

31/9.50R-15LT, Radial TSL, Interco
Load Range C
Max Load 2160
Tread Depth 19/32
Overall Diameter = 30.7
$136.79 with 5% off @ 4wheelparts.com
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2002 4dr Kia Sportage 4X4
Tires:235/75/15, Wheels: Black 15x8 Steel ProComp 2.5" B.S., Hubs:Warn Manual, Lift:3" UPYOURKIA, Trailer Hitch, Cargo Rack, Clinometer.