I don't have numbers for you, however , I can say if you have a 60 hp tractor you need a 8-10ft wheel disk with the amount you want to do. A drawbar pulled disk will do a much better and faster job than a 3 point. I have a JD 5205 4x4 ( 55 hp). I used to have a 10ft JD wheel disk. You could get some work done in a hurry and was a much better seed bed. I sold it because it was too wide to move through the woods from plot to plot. Would love to sneak up on a good 8ft.