Re: IPT 589\'s on RTV
I have a buddy who had a set of 589's on his Yamaha Rhino. He really liked them and said that they pulled very strong in the deep mud, but ripped his yard up pretty bad. Based on that, I bought the Maxxis Bighorn Radials for my RTV. After taking this same guy out mudding in my RTV with the Bighorns, guess what he did? He put on a set of 27" Bighorns on his Rhino. Guess what I just ordered for my Rhino....a set of 27" Bighorns. Glenn, my buddy with the Rhino, tells me that the Bighorns pull as well as the 589's on his Rhino but do not do the damage to has yard and ride a lot better.
If by chance you do go with Bighorns for your RTV, 25" is the biggest that will fit. Bczoom and I both are running the 25" Bighorns on our RTV's and they are at least 26" tall. I can't speak for bczoom, but I really like them. Unfortunately, it seems that the Bighorns are more expensive though. For a while almost every place was out of them too. I've been waiting for a month now for the 27" ones to come in. They have been shipped now. I can't wait to get 'em on.
Good luck with whatever you go with. I'm sure that they will likely be better than the stock tires.