Wheel Size

[clarenceboddiger]

Having seen some really attractive alternate wheels on here lately, I am looking to buy a set so what do I ask for with regards to PCD and offset? Diameter and tyre sizes I'm ok with.
Am I correct in thinking PCD is measured from one stud centre to the adjacent stud centre, and offset measured from the inner face of the mounting centre to the outside edge of the inner wheel rim?
Would someone please confirm the standard figures.

[Roy C]

http://www.easypcd.co.uk/#what
http://www.nice-wheels.co.uk/pcdandoffset.html

The PCD for S series is 4x108 (108mm, 4 stud). This is a common Ford pattern.

[tozerman]

Standard offset is et25

[clarenceboddiger]

Thanks for the Info, its a good job I asked I had it all wrong

[zombeh]

If you're going wider than the standard 7" you don't have a lot of room on the inside on the s1-3 (as I found out when I discovered someone had fitted an s3 trailing arm to my v8)

[phillpot]

tozerman said:

Standard offset is et25

Had a look at above web site, very good but doesn't explain what "et" stands for ? is it negative offset and different letters for positive

FOUND THE ANSWER !

its an abreviation for the German word "einpresstiefe", literal translation "insertion depth"

Edited by phillpot on Wednesday 9th December 12:16

[clarenceboddiger]

phillpot said:

tozerman said:

Standard offset is et25

Had a look at above web site, very good but doesn't explain what "et" stands for ? is it negative offset and different letters for positive

FOUND THE ANSWER !

its an abreviation for the German word "einpresstiefe", literal translation "insertion depth"

Edited by phillpot on Wednesday 9th December 12:16

So How do we know if its positive or negative given ET25 then??

[clarenceboddiger]

zombeh said:

If you're going wider than the standard 7" you don't have a lot of room on the inside on the s1-3 (as I found out when I discovered someone had fitted an s3 trailing arm to my v8)

As I will be putting the wheels on a converted to V8 S2, using V8 arms I should have asked if the wheel sizes are the same on the V8???

[zombeh]

Standard wheels are the same, they're 21mm further out though so there's more room behind them.

ETA, it's positive, I think there would be a - in front of it if it were negative, I've never seen negative offset wheels though.

Edited by zombeh on Wednesday 9th December 19:00

[phillpot]

zombeh said:

ETA, it's positive, I think there would be a - in front of it if it were negative, I've never seen negative offset wheels though.

Edited by zombeh on Wednesday 9th December 19:00

Anyone as old as me will probably remember the days when "Alloys" were a rare (and very expensive) option and it was common to have steel wheels cut in two and a band welded in, this gave some serious negative offset !

Edited by phillpot on Wednesday 9th December 20:16

[clarenceboddiger]

phillpot said:

zombeh said:

ETA, it's positive, I think there would be a - in front of it if it were negative, I've never seen negative offset wheels though.

Edited by zombeh on Wednesday 9th December 19:00

Anyone as old as me will probably remember the days when "Alloys" were a rare (and very expensive) option and it was common to have steel wheels cut in two and a band welded in, this gave some serious negative offset !

Edited by phillpot on Wednesday 9th December 20:16

That was always the way to go on F1 Stock Car wheels too

Edited by clarenceboddiger on Wednesday 9th December 20:24