I too have a Ferris. ISX2200. Same oil system as yours.
In your opinion do they hold cutting a slope better than the turfs? How about turf damage? I know the inside tire, no matter what tread will shred the lawn if the operator spins around on a dime, but how is it for 3 pt turns or gradual turns.
Just so you know, I live in the country. My lawn used to be pasture, so I'm not as particular as someone with a manicured lawn.
I think the new tires were a big improvement over the supplied turfs. Side slopes that had been impossible with the turfs will sometimes suffer some damage with the new tires.
A short hill that I mow up and down could not be climbed with the turfs and going down used to be a slightly controlled skid. Now it's possible w/o skidding.
I read once that the advantage of four wheel drive was the ability to get stuck in more inaccessible places.
The places that I do some turf damage with my new tires are places that I couldn't even go with the turfs.
I can now mow close to my pond without sliding. I actually did damage with the turfs sliding sideways in the same spot. (That's what prompted my tire change.
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If you are careful and take reasonable turns you will be fine, if you really want to destroy your grass you can do that too. Just try a few power turns when the lawn is wet.
BTW, I sold my old mower (a Ferris 1000z, that has chevron tread tires) to my neighbor. He is happy with the tires and has no plains of changing to turfs.