Sorry to let you know but you don't have anyway near the amount of clearance you need to run 33x12.5's offroad, you need a 3" bodly lift AND a 3" suspension kit to run those tires. Your rim choice is also going to cause you to wear out steering parts up front a lot quicker than normal...take it off road and make sure you bring tie rod adjusters and a new centerlink because they ARE going to break. I don't mean to scare you but you should have asked more questions first, a lot of us could have helped you make the right choices...rim offset/size is very critical on Nissan's.