Rear not level

[gergnamenorg]

I was thinking about lowering my 2017 with 168k miles, so first I measured all four wheel wells at the center of wheel. Both front sides are 35.75". I then found the first surprise when right rear was 35.25". I checked and the body is slightly higher at rear (as expected), so my thought is the front wheel well is larger to accommodate wheel turning? Then found the second surprise when left rear was 34.75. I checked and body is leaning to left, but I got nothing other than spring fatigue?

any help is appreciated. and yes I double checked all measurements while on flat surface with front tires staight.