The tire is a big 420 pound tractor tire. The sledge is a standard 8 pound hammer. I tried to set the tire up on edge but couldn't budge iit. The therapist told me it weighs 420 pounds. I said that was 10 pounds more than I can lift. Laughter ensued.

There are many exercises for stroke victims. He only put me to the tire because I was drawn to the sledge. I spent many hours in my youth driving fence posts with a similar hammer.