Looking at the Grid wheels, I bet those are 4.50 backspace with -25mm offset.
I like the look, but would want the tires tucked in a hair more. Grid makes a 20x10 with 5" backspace and 12mm offset. That stuff always makes my head spin, but if I understand it correctly, that would pull the wheel in 1/2".
I bought a set of the General Grabber X3’s for my Silverado over 3 years ago. Best M/T tires I had ever used. I sold my truck last weekend and after 3 years they still had a ton of tread left. Rotating them every 5,000 miles is the key to longevity of M/T tires. This picture of the tires was taken last weekend before she rode away in the sunset ?