Slope gauge app said 4.9/12. This is around 40% slope Wheelbase is 52" wide with 22x11.00x10 tires and a VERY low center of gravity. Total length is nearly 9 feet. The deck is 61" wide. Seat height is 30" which is MUCH lower than most commercial mid mounts. Finally with my fat butt on it she weighs #1700. This is the ONLY reason the hopper will run this slope. I have a few other properties about as bad. While nobody advises mowing slopes like this i am one of the only ones in the valley capable of it and am paid well to do it.