We have both a 9700 and a 9720, plus a MF 8560. We found the best way to overcome the weight problem on the 9700's was to go with 18.4x38 radial straddle row duals on the front and 16.9x26 radials on the rear. With this tire combination we have gone thru places that a regular tractor would get stuck up to the axles unless it was 4-wheel drive. If you want to hear some more e-mail me.