stud pattern size

yeprat1 · Post by **yeprat1** » Sun Jul 06, 2008 7:11 pm

hey guys i was browsing the internet for wheels in the usa and was wondering what is the actual measurement of a fb - hr stud pattern just to help see what is available and do the yanks measure it the same way

Thommo · Post by **Thommo** » Sun Jul 06, 2008 8:41 pm

Gday yeprat

Early holdens are 7/16 stud on a 4'1/2"PCD*
HQ pattern is 7/16 stud on a 4'3/4"PCD

*PCD = Pitch Circle Diameter
That is the diameter of a circle,
drawn through the middle of each stud.

Cheers
Jeff

Finny · Post by **Finny** » Sun Jul 06, 2008 11:11 pm

If you find anything interesting (nice wheels that will fit) put some pictures up so we can all see.

Post by **Blacky** » Sun Jul 06, 2008 11:53 pm

Thommo , you sure they are 4 1/2" ??
I thought they were 4 1/4" and &*#@ were 4 1/2"

yeprat1 · Post by **yeprat1** » Mon Jul 07, 2008 6:26 am

hey thats what i was thinking cause 41/2 comes up very often on their sitesmaybe 41/4 anyone know

Finny · Post by **Finny** » Mon Jul 07, 2008 8:48 am

EK Manual says -----

Rim type = Drop centre
Rim diameter and Width = 13 x 4.50 J
Bolt Pitch Circle Diameter = 4.24 in

Hope that helps.
Not sure if it's the same for other models.

Thommo · Post by **Thommo** » Mon Jul 07, 2008 5:45 pm

Thank you Finny & Blacky
Once again, I stand corrected, and I am wiser for it.
Cheers
Jeff

mrs ratbox · Post by **mrs ratbox** » Mon Jul 07, 2008 8:48 pm

you can buy centrelines in early holden stud pattern from rocket

basic.green · Post by **basic.green** » Mon Jul 07, 2008 9:51 pm

Hi i just had a look at centreline wheel list and there is no 4.24 only 4.25 pcd ??? i will be getting convos for my car so i will need to no any help???

Post by **Blacky** » Mon Jul 07, 2008 11:29 pm

Basic.green, the PCD is 4 1/4" , the 4.24" bit would just be a metric to imperial conversion misprint.

basic.green · Post by **basic.green** » Tue Jul 08, 2008 9:24 pm

thanks Blacky

Malcolm · Post by **Malcolm** » Tue Jul 08, 2008 9:57 pm

Hey Basic.green,

You must have some more pictures of you build by now hey

I was trying to find your posts of your car the other day but I was stuffed if I could find it.

I just luv that engine bay.

Mal

basic.green · Post by **basic.green** » Tue Jul 08, 2008 10:54 pm

Hi Malcolm i have not done much at all other than getting the motor going.
i am selling the house at the moment so i have to have the shed tidy and c/bill is very busy lately(the painter) i might ask ek61 if he could put some pics up for me (i am on dial up) thanks for the interest. i think i am on page 3 or4 it dosent take long to go back.

Finny · Post by **Finny** » Wed Jul 09, 2008 9:50 pm

Blacky, I'm not sure what you meant by a misprint in conversion. I got this straight out of the Original 1992 EK Manual.

I don't know what difference the .01 makes, but wouldn't this have been done before metric conversions existed ?

yeprat1 · Post by **yeprat1** » Thu Jul 10, 2008 5:05 am

guys i spoke to my my mechanic he seems to think the the stud thingy's that bolt on your existing studs to change to another size are not illegalin nsw but i think i may send the rta an email