I too run a 5-footer on my 2015 4WD (gear). I have no problem pulling a full box of gravel up a steep driveway. I just used it, and the front end loader, to pull about 4 to 5 inches of top soil off about a 60 x 90 foot area that will become a garden area. It was loaded with roots and rocks, and will eventually be put back. I don't think you would be at all disappointed with a 5-foot box blade on the 2015.