I have a 2009 Outback 230 RS (two axles). The right side rear tire is wearing at a much faster rate than the other three tires on the Trailer. Most of the wear is on the outside of the tread. Is this typically correctable thru some mechanical adjustment like a car would have, or does the axle have to be bent to provide adjustment? The tires have one more year before I would replace them, assuming trailer tires are like automotive tires and have a 5 year recommended life span. I can probably just put the spare on to get by, but in the long run would like to correct the problem. Oh yeah these are the cheapo Chinese tires Outback put on the rig originally. I feel fortunate they haven't fallen off the rims.......