Get 20" Addicts and get at least 33's.
31's are WAY too short. I'll just be real blunt. 31's will look stupid.
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2008 CTD Mega Cab Laramie 4x4 -
Leveled, 20" Moto Metal 956's, Nitto TG's, AEM Brute Force CAI - Edge, MP-8, "Some other stuff fell off."