NYBOB, I think most people that complain about the R1's while doing loader work don't have enough air pressure in the fronts and usually roll them off the bead. Keep them aired up to the maximum air pressure and you will not have a bit of problem with the R1's while doing loader work. The ONLY drawback to R1's is tearing up grass in a wet yard and thats it! The are way better in my opinion for all other applications.
Sincerely, Dirt