New set of 589's
 

Got in my new set of 25" ITP 589's on ITP's SS108's. Of course I had to measure them. Both the rears are definately larger than the fronts. The fronts a little over 25". But the rears measure 25 3/4". I'm measuring a little over 1/2" difference. I'm measuring against a wall at their highest point. They had 15 lbs of pressure in em when i got em. But I dropped it down to 6 on the rears and 8 on the fronts. I asked the supplier about it hoping to get assurance all is ok. Don't know if it is from his relpy "Most people run 5-7 on ATV's and 8-12 on large UTV's (like Rhino and Rangers). I would not expect to see much difference in overall diameter if the tire pressures were not off, so that is a little odd".[img]i/expressions/face-icon-small-confused.gif[/img]

New set of 589's
 

Make sure the pressure is the same front and rear and measure them. You probably should have 5 PSI if that's what the stocks tires had. I wouldn't be surprised the rears are a full inch taller. You'll just have to wear them down until they're even. [img]i/expressions/face-icon-small-happy.gif[/img]

New set of 589's
 

Neither my stock tires, nor my after-market tires measured the same front and rear when mounted and aired-up equally. I wouldn't be too concerned as long as you aren't planning on running in 4wd on pavement.