Zero Turn and Bar Tires

Does anyone have any recent experience using bar tires on a zero turn?

I have 4 acres of hilly, lake front lawn to mow with my CC "Ultima" ZT2 60" mower with the OEM turf tires. I've reduced air pressure to the bare minimum but still experience a fair amount of skidding where you'd think it shouldn't. This is on dry, good cutting days, not just damp or muddy turf. Once a turf tire starts to skid, there is almost no chance of recovery until stopped. And, if they clog with dirt, it really stays in the treads making things even worse.

I was thinking of adding some rear weight, maybe 80lbs or so to see if that improves anything. It seems that it is just barely slipping into skids, and I wonder if the extra weight might hold it down just a bit.

Haven't given up on the turfs yet, but just wondering if anyone has switched to bar type tires and whether they found them better than turfs and if they do more damage in normal cutting.