Just in case you get interested in the 30" tires from treadwright, they offer the mud design like this:
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But the same style with their Kedge grip comes in a outer diameter of only 29 3/8".
I like the 31" tires that Nukeiridium suggested better.
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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.