Tires Tires Tires!!

I recently got into tires, I mean BIG tires. Started with a 18.4 R38 Tractor Tire. Weighs 317 lbs. I have been flipping it 20 times a session as well as beatin it with my sledge. I also just uilt a dragging rig out of a semi tire and a climbing rope. What I’m trying to get at, is I thought I was a pretty tough guy, till I started throwing this serious rubber around. This tire stuff is no joke! I have’nt been this sore for awhile. I have some serious chub to lose, Any opinions on the tire work? Thanks.