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Author How to measure wheel pcd???
Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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21st Oct 13 at 16:25   View User's Profile U2U Member Reply With Quote
What's the best way to accurately measure a wheels PCD??
RichR
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Registered: 17th Oct 01
Location: Waterhouses, Staffordshire
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21st Oct 13 at 16:30   View Garage View User's Profile U2U Member Reply With Quote
4 stud or 5?
RichR
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Registered: 17th Oct 01
Location: Waterhouses, Staffordshire
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21st Oct 13 at 16:34   View Garage View User's Profile U2U Member Reply With Quote
If 4 stud, use a vernier to distance between the outermost face of one hole and the innermost face of the opposite hole-that'll give you the centre to centre measurement. Take the measurement off the back face of the wheel as the holes there are true circles whereas on the front face the holes might be skewed by the spoke design,
Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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21st Oct 13 at 17:29   View User's Profile U2U Member Reply With Quote
They are 5 stud. Either 5x112 or 5x108.
Ian
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Registered: 28th Aug 99
Location: Liverpool
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21st Oct 13 at 19:48   View Garage View User's Profile U2U Member Reply With Quote
5 is more difficult as the diameter goes from one hole to the theoretical circle on the other side.

Might be a way to measure the hole distances as per the 4 stud method and then use some calculus, probably easier to mount and see if it fits if you have a suitable car.
ed
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21st Oct 13 at 20:48   View User's Profile U2U Member Reply With Quote
[img]http://shop.exceltrailers.co.uk/ekmps/shops/exceltrailers/images/wheel-and-tyre-195-14-[2]-308-p.jpg[/img]
nibnob21
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Registered: 16th May 10
Location: South Derbyshire
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21st Oct 13 at 20:55   View Garage View User's Profile U2U Member Reply With Quote
Measure the centre bore, measure the diameter of one of the bolt holes. Add them together.

Now measure the distance from the inner edge of one of the bolt holes to the inner edge of the centre bore hole. Double that value and add it to the previous value and there's your answer.

Sounds long winded but it will give you the right answer.

MX5 Project Thread
alan-g-w
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Registered: 9th Nov 07
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21st Oct 13 at 20:56   View User's Profile U2U Member Reply With Quote
http://ww2.justanswer.com/uploads/mikdermoose/2010-02-07_012044_PCD_5_stud_chart.jpg

[Edited on 21-10-2013 by alan-g-w]
Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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21st Oct 13 at 21:17   View User's Profile U2U Member Reply With Quote
Thanks, will give those a try.

Had an idea of using 1 of those things that draw a perfect circle. Do 2 of them with a PCD of 108mm and 112mm and see which 1 matches up when placed on the back of the wheel.

 
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