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Stud Patterns / Pcd --guide

Started by _2DOOR_ , Feb 20 2008 06:02 PM

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5 replies to this topic

#1 _2DOOR_

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Posted 20 February 2008 - 06:02 PM

don't know if this has been posted before?

Stud Patterns / PCD
(for all hubs / hubdrums / hubdiscs)
Stud patterns are worked out using the PCD measurement. This is the distance from one side of the stud circle to the other . Many wheels from different makes and models have the same PCD, ie. even though a stud pattern is referred to as 'Ford', it also matches Mitsubishi, Mazda, Toyota etc.

Ford - 1/2" UNF studs - 5 Studs - PCD 114.3mm - 68mm from stud to stud

Holden HT / Early Holden/
Torana - 7/16" UNF studs - 5 Studs - PCD 108mm - 65mm from stud to stud

Holden HQ - 7/16" UNF studs - 5 Studs - PCD 120.6mm - 72mm from stud to stud

Commodore - 7/16" UNF studs - 5 Studs - PCD 120mm - 72mm from stud to stud

Gemini - 7/16" UNF studs - 4 Studs - PCD 100mm -

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#2 _CHOPPER_

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Posted 20 February 2008 - 07:10 PM

don't know if this has been posted before?

Too many times. Despite this, a lot of threads are started asking questions like this. I spent 21 years in the tyre industry and am one of many people who can quote stuff like this in their sleep.

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#3 Toranavista

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Posted 20 February 2008 - 07:21 PM

Always thought the Commodore had metric studs

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#4 _CHOPPER_

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Posted 20 February 2008 - 07:48 PM

They do, as does the Gemini. I've seen that stuff so often I didn't even bother looking at it properly.

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#5 _2DOOR_

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Posted 22 February 2008 - 05:54 PM

Yeah you're right, pretty sure the commodore are 12 x 1.5.
Gemini does anyone really care?
what I thought might interest people is the stud to stud measurement as a guide as its hard to measure PCD.
cheers Jeff

Edited by 2DOOR, 22 February 2008 - 05:55 PM.