i have all 4 wheels and tires up for sale $200 + shipping or local pick up for those rears do have a plug in the sidewalls but near new tread fronts same condition rims are a little beat but all 4 still hold air for weeks at a time.
i also have rear wheel spacers/ adapters that change the rear bolt pattern to the more common 4x110 that is found on the rest of the honda sport quads. you do have to remove the rear scapers and as far as i know you still have to run a 10 inch rear rim, 9 inchs may fit though i just never got the chance to try. the main down fall is that the rear of the quad becomes 54-55 inches wide, but i rarely had any problems if, a yamaha rhino can fit through a trail so could I. $120 + shipping or local pick up.... big plus out of doing this is that the 700xx will slide sideways no problem and still hook up better than most quads
i'm also selling the stock rear hubs for my 700 i've found a new set up to run and no longer need these $100 + shipping or local pick up