drobuck86

Hello! I just purchased my first F150 and had a few questions. I Have a 2013 Fx4 with apperance package with the black 20's. I really like the rims but would like to get a more agressive off road tired. Nothing insane but enough for some snow,sand , and a bit of mud. What tires size will fit without a leveling kit? I honestly have never owned a truck and I have been searching high and low but cannot find exactly what I need. Also what is the benifit of leveling? I kind of like the nose down look. Thank you for any help!