I've recently put 25" Dirt Devils on my Rancher 4x4, but have found that the diameter of the front tires is about 3/4" less than the rear (@ 6 psi). In stock configuration they are the same diameter. Will this potentially lead to increased drive train wear and/or damage? And if so, would it be advisable to increase/decrease the front/rear tire pressures to achieve equal diameter; maybe in the realm of 9 psi front, 5 psi rear - not too extreme though?

Thanks in advance!

Mark