I don't understand why you want that size stud and that is a silly hill to die on. Stock width should be something that G2 can do off the shelf but not with that stud diameter. Stock width is bizarre but they should be able to do it or very close to it. Why stock width?
9/16" because that's what I have now and it's easier for them to install the off the shelf studs during assembly than it is for me to do it.
Let's not forget that their mission statement is to solve my needs!!!
They didn't just deny me the 9/16 stud, but also 5x5.5, and also refused to just leave them out.
As for stock width, my front Currie 44 is stock width, I also just spent $4k on new wheels and tires. The 3.5 backspace keeps me out of the front lower control arms and I despise the turtle look. It is almost as ugly as a slant back top and angry grill.