My son is running Jr Lo206 in an 2020 OTK chassis. This is our first season with only 2 practice days and 2 races under our belts. One thing I have noticed is his rear tires (MG reds) wear on the inner 3/4 of the tires width (most signs of aggressive wear being in the inner most inch or two).
The outer 1/4 from just outside the outer wear dot goes from barely scuffed to zero signs of wear going out the the rounded edge. The inside rounded edge has a thin line of rubber build up. I took a stroll around the pits and seen this pattern on some competitors tires as well (not necessarily the faster competitors).
I had recently made some set up changes to raise the seat, and raise the rear ride height. We mostly go out F&R on 16-17psi cold for 5 minute practice or qualifying. Features we go out between 15-16. His axle is an N and width is under the limit at around 53.75 I think.
I had not played with rear width but I did try to widen the front. Some and then less. If any of my changes effected tire wear I would say that where they are showing heat and wear, then they are showing more of it