Anybody know the socket size for the stock lug nuts? I know they're M12x1.5, but I'm not at the car now and need to pick one up on the way home.

 

I believe 21mm.

 

Just went outside to check. 21mm it is,

 

Cool, thanks!

 

yes 21 mm it is

 

BTW - I found that the 21mm socket is a little loose, but one of my spark plug sockets fit perfect. I think it was the 13/16 but I could be wrong, maybe 7/8.

 

I have both a 13/16 and 21mm socket. I use the 21mm for everything now even if it isn't a snug fit. Tapping the lugnuts out of the socket is annoyance enough, and the slight looseness hasn't created any damage I can find.

Dave

 

Good point, I ended up using the 21mm anyway.