I should have mentioned my specific use for turfs. We live in the Rocky Mountains and there isn't much soil. Most of what we have is either rocks or disintegrated granite.....and a lot of tractoring is done on side slopes. Flat ground is rare. We can get work done in some "soils" with R4 industrial tires, but wide sticky turfs with a lower CG are the real ticket. They tend to have better traction anyway in our conditions. The ground doesn't give enough for Ag tires or R4s to get any purchase with the lugs. Lugs help in the first of the snows, but as that turns to deep ice covering frozen ground then chains are necessary.
"horses for courses" rscotty