Do ZTR's just have a tendency to bounce a lot ? So far I have Demoed a Hustler SuperZ, and a John Deere 757, and both will bounce a lot in certain areas of my yard. I believe the Deere is actually worse than the Hustler. I plan on having dirt brought in this fall to smooth out a few areas, but the ride is pretty rough everywhere. I just checked the air pressure in the John Deere, and the front tires have 17psi and the back tires have 15psi. would lowering the air pressure help a little or a lot? I wonder if these machines will hold up to this type of pounding? More importantly I wonder if I will hold up to it .. lol.