Hello, I just ordered 22” rims for new 2023 g550, which tire size will fit best? I saw g63 usually has 295-40-22
But saw others saying 305, what do you think?

 

You can use this site to compare between sizes. 305/40 R22 is pretty close to the stock 295/40 size. Is the tire you want available in either size?
https://tiresize.com/tiresizes/295-40R22.htm

Did you order OEM wheels? There’s an offset calculator on the same site, if you want to get the full comparison to your current setup:
https://tiresize.com/wheel-offset-calculator/