I'm going to a 2" suspension lift, 15x8" rims with 3.75 backspacing. I'm looking at the Kumho venture MT, which comes in 31 x 10.50 or 31 x 11.50, and the 11.50's are $10 more. Would there be much of an advantage/disadvantage in going with the inch wider. I'm on sand roads a lot, so I thought the wider tire would work better. What about clearance issues with the fenders and radius arms? I want to be able to flex without hitting.