Yeah I added some 3" Moroso studs. I'm not happy about the wheel spacers but it is what it is. I tried 5/16" first and that wasn't enough. These wheels are 6.5" back spacing and it seems like they should have been 6". But they only offer one option.If you're not running ARP extended studs yet, I would recommend that you look into installing those. Have heard about studs snapping when wheel spacers are added to the mix. Not to mention the lack of thread engagement.