I just got some Weld 15 x 6 Prostar wheels for my car and I don't think the lug nuts I got are right. They are SST mag 12mm x 1.5 R.H. . They also have 7/16 and 1/2 in this SST mag lug nut. What size is a stock 91 Firebird Formula?

Also they are open end, I like the looks of the closed end better, can I use closed end?

thanks,sorry for the stupidity. This is the first time I have bought wheels

 

The stud size you need is 12x1.50 . Unless you have xtra long studs you can go with the closed end lugs
Daryl

 

OK thanks, thats what I thought. I would think the closed ends would look better for show, I guess the use the open end for pure racing applications. I might just keep these and order some closed end ones. Thanks
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