I have a UForce 1000 with 30" tires on stock rims and suspension. It's not the same machine, but stock tires are 27" too, so there might be similarities in clearance design.
I took the front 2" spacers off (I left the rears on), because the tires rubbed at full left lock as they pushed the tires back. The stock suspension is cranked to max. I have no turning rubbing issues, but I haven't launched the machine yet to see if I get a compression rub. I don't plan on it either, LOL. I do want to soften the suspension and see how it goes, because I'd like a more plush ride around the farm. I'm thinking about getting some Hester Stage 1's anyway, so I'm looking for a problem! Haha!
Hope this helps.