Originally Posted by Willard164
Some will argue that mixing front tires with rear tires "may" result in the rear tires being a different mounted diameter, due to a different wear pattern as a steer tire. A dual tire axle want tires of EQUAL mounted diameter, or one tire takes more of the load. Crowned roads always raised havoc with DRW vehicles, Thus JamieGeek's right-hand diagram seems to make more sense. Keep the rears wearing the same... cross front L-to-R, and replace in sets of two or four... unless they rot from age/UV destruction beforehand.
Youíre not going to have much discrepancy in tire diameter, rotating them on a set schedule. Thatís the whole point of rotating them around; keep consistent wear, without an abnormal pattern forming in the tread.
On an E-Series chassis, itís absolutely critical to rotate, given the constant camber and toe changes of the TTB frontend. Only swapping them side-to-side, guarantees a chewed up set of front tires.