Put my street tires back on a couple weeks ago and found my rear drag radials are wearing strange.

The inside 3-4 inches have way more tread than the rest of the tire, like there's a camber issue but there's no camber adjustment on the rears that i know of. 60 ft. times are the same as they've always been and there is absolutely no shimmy or vibration so I know the balance is good.

It's the same on both rears. Running MT ET Streets with 17 PSI. Anyone have a clue what might cause this?

Tires never wore like this when I was running my old 15x8 Dakota wheels. I bought some used 15x9 Welds a while back. Could there be something with the wheels? Different backspacing or something? They do stick out more than the 15x8s did.