I have been having a problem for as long as we have owned our 5er, excessive tire wear on the inside of both rear tires. I took the trailer in to an alignment place today. The rear tires had much (way under stated) negative camber and a bit much toe-out, the fronts also had ~3* negative camber and toe-out.
The tech didn't even bother with checking the rear, he just started adjusting. Until he got it close enough to bother measuring, there was no point to even know how far out they were. You could see with your eyeball there was an issue.
I'm suspicious that the trailer was either in an accident, from the previous owner or shipped that way from the factory. The tech said it looked like the right side had been in a hole and that it is not uncommon for trailers to need a little adjustment even new.
Now I have a new mission, to see if the alignment changes MPG or tire change interval due to wear. I haven't been getting poor towing mileage, but who knows. On average we have been replacing the rear tires about every 3-4,000 miles. At first I thought it was because of the age of the tires, or they were the cheap Chinese ones, now I'm not so sure. If I get to wear the face of the tread down a little that will be the thing that seals the deal and will make me a believer in trailer alignment.
Wish me luck, we have a trip coming up to the Oregon sunstone collection area located ~25miles NE of Plush, OR. The road to the sunstone mines is 25 miles of washboard. Weird, in WY the washboard tended to be at the turns and stops, this
whole freaking road is a washboard. I guess this will test the alignment.
Trailer alignment
Linear Mode
