Powerslider touched on this in another post. It looks like for now upgrading tire size on the Hawk is truly limited. It seems to me 24's would be the perfect size, since the 25's appear to need some trimming done on the rear wheel/floorboard area, but very few manufacturers offer a 24 for our 12 inch rims. I did see a couple of 23's but who just wants to upgrade 1 inch? Maybe if Polaris sells a ton of these things some tire co. will step up and offer more tire choices for the Hawkeye.