Extended wheel studs necessary with 15x7 +38 on a gsr?

 

Do you already know whether or not you need spacers, and if so how thick, or is that part of your question, too?

The normal rule of thumb regarding whether extended studs are necessary is that you need at least six full turns on the lug nuts, and if you don't have that, you need extended studs.

 

No spacers needed.

6 full turns, thanks.