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Old 09-06-2012, 01:39 PM   #1
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Focus wheel stud diameter?

I've searched but can't find a definitive answer anywhere, so I'm asking it myself. What is the diameter of wheel studs for the Focus? I know that they're 12mm x 1.5, but there are also various diameters. From what I can see on CFM's website (the picture is really small), it looks like the part number on the ARP studs might be 100-7708. That would mean the studs are 0.509", is that correct?

Next question, I need to get extended studs for 15mm spacers. Stock lengths are 47mm(disc) and 42mm (drums), correct? That would mean that for 15mm spacers I would need 62mm and 57mm studs?

So, as a final check, for 15mm spacers I need 57mm and 62mm 12x1.5 wheel studs with a .509" diameter, correct?


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Old 09-06-2012, 02:57 PM   #2
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yes you need extended studs for that size spacer......order those arp studs and you'll be fine!
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Old 09-06-2012, 03:05 PM   #3
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your asking about the shoulder or knurl width right?

i would have to measure a oem one to figure it out.
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Old 09-06-2012, 03:18 PM   #4
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Quote:
Originally Posted by jasonbi View Post
yes you need extended studs for that size spacer......order those arp studs and you'll be fine!
So the ARP studs that CFM sells are long enough for 15mm spacers, they're not just OEM replacements?
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Old 09-06-2012, 03:23 PM   #5
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they are extended for sure...if im thinking right they're the same a older trans am or firebird(or something like that) so not OE ford at all!!lol
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Old 09-06-2012, 04:54 PM   #6
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Do I need open lug nuts to run them, then?
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Old 09-06-2012, 10:37 PM   #7
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you will!
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Old 09-07-2012, 03:36 PM   #8
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12mm is the outside diameter of the thread. The AROUND studs are stronger than oem and are quite long so as mentioned you would need open lugs. Normally any wheel spacer kit you buy comes with the proper replacement wheel studs.
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