I have no idea who invented this thing, but it is seriously the best way to split wood ever. No more chasing pieces, no more bending over, just insanely fast wood splitting. I am way faster than a hydraulic splitter. It is not even close. Granted, I get tired eventually but I am easily splitting 5 times as much wood as I was without the tire. I figure at least 1-2 face cords an hour with reasonable effort. I used to be faster with the saw, now I am faster splitting.
Anyways to make this, get a big chopping block, and screw some scrap 2×4′s to the sides, then put a scrap tire on it. I screwed the tire down but I don’t think it would actually move too much if you didn’t. Then fill the tire full of wood, and go nuts. Very rarely one piece will pop out but the best part is you can fit 4 pieces in sometimes. That cuts down on all the chasing and wasting time.