Front and rear tire size

Hey folks. I just bought a 2001 fourtrax 350 4×4. The bike is in awesome condition. Now. It has 4 brand new tires on it which is awesome. But what I noticed tonight is that the front are 25×8-12 and the rear are 24×9-11. With the rear tires being 1 inch smaller in overall diameter will this do any harm to gears or transmissions?