I might have missed something, but, has anybody thought about what kind of loader work are we going to do? That would seem to me to make the difference here. What kind of weight, how far travel when loaded?? I have a 48" bucket on my FEL and it seems to do fine with the ballast box. No loaded tires, but, I didn't want turf tires either. I have not had a problem with the turf.
My tire distributor said if it gets to be a problem you can use a tire groover and take off the edges of the bars.
As far as the gravel being spread, It took me just about an hour to level and spread 20 tons the other day, sure was fun, I mean work!
I cut 4 acres Saturday up north in less than two hours, several out buildings, 28 trees. Terrain somewhat rolling, nothing too awful bad.
Just my .02