I have a Aries 54" 2010 model. I have a lot of places in the 2.75 acre yard where the rear wheels slip as the yard roles down toward a bluff and I'm trying to come back up the hill. Its about a 25 degree angle, the wheels slip on the grass. When I had 30 acres and a tractor we would fill the wheels with water for better traction, but they had inner tubes. Im afraid to do this with the lawnmower because of rusting the rims. I don't have the room to add a rear weight hanging off the back. Is there another solution? Something cheap that wont rust the rims?