Excessive Rear Tire Wear 2015 Rzr4 1000

I have a camber issue I believe with my left rear tire (and slightly on the right rear as well). The inside tread is half gone within 300 miles of driving. The stock tire was wearing at 75 miles the same way. I replaced the wheels and tires with 31 x 14 Motohammers on MSA Beadlocks. 10% of my driving is pavement to and from mountain roads. 90% of the driving is forrest trails and on gravel roads. I am 63 years old…..no donuts or wild turns. I realize with a direct drive rear end that tires will wear on turning but not like this. I have a friend who purchased the same car with the same tire and rim setup that I have and he does not have this problem. The dealer response is "Oh they all do that". I am a mechanic…..have checked all connections and nothing appears to be loose. I’m taking to my friends front end shop to have it lasered to see if it is the camber…you can visually see it from behind……Whew…that’s alot, sorry but no one seems to have this problem but me. Can the camber be adjusted with aftermarket radius rods without tweaking the trailing arm? Measuring with a square and tape measure the bottom of the tire is 1 1/2 inches further out than the top….any help would be appreciated.

Attached Thumbnails

Click image for larger version

Name:	Rear tire 1.jpg
Views:	N/A
Size:	108.7 KB
ID:	145321