C4S wheel offset question
#1
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I've decided to get a set of 18" Techart Formula wheels, but I have a choice of offsets on the 8.5x18 fronts. I can get them in either ET40 or ET50. Which is better for the WB cars? I'll be running either 225 or 235 tires on a car at ROW M030 height. Thanks in advance!
edit: car is a 97 C4S.
edit: car is a 97 C4S.
#2
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FYI
I am running, on my 198 C2S (wide body) a set of "Sport Classic II", BBS wheels, the "offset" on the front is ET 50, size 7.5 J X 18" on the front, tires are 225/40 X18.
On the rears, the "offset" is ET65, on the 10J X 18 Wheel size. Tires in the rears, 265/35 X 18.
they fit perfectly, as I changed from the 17", "Cup" Wheels. The car has been lowered to MO33 ride height, with "Comfort Springs".
Hope that helps,
Bert
I am running, on my 198 C2S (wide body) a set of "Sport Classic II", BBS wheels, the "offset" on the front is ET 50, size 7.5 J X 18" on the front, tires are 225/40 X18.
On the rears, the "offset" is ET65, on the 10J X 18 Wheel size. Tires in the rears, 265/35 X 18.
they fit perfectly, as I changed from the 17", "Cup" Wheels. The car has been lowered to MO33 ride height, with "Comfort Springs".
Hope that helps,
Bert
#3
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Thanks Bert, but even though the 2S and 4S share the same body dimensions, I'm wondering if the suspensions are different in terms of spacing. I know the C4S is the same as the turbo, which I assume is different from the NB suspension. Are you running spacers? Your rear offset of 65mm seems awfully big. I believe the C4S rear offset on a 10" wheel is about 42mm.
#4
Instructor
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I do not have the answer on the 8.5x18 fronts but I can give you the standard sizes and offsets.
The C4S, the standard "turbo look" (or hollow spoke turbo) wheels with no spacers:
The 65mm offset were designed for the NB cars but could be fit to the WB cars by including a 25mm spacer
The C4S, the standard "turbo look" (or hollow spoke turbo) wheels with no spacers:
- 8J x 18 front, offset 52mm
- 10J x 18 rear, offset 40mm
The 65mm offset were designed for the NB cars but could be fit to the WB cars by including a 25mm spacer
Last edited by Jeff U; 05-06-2011 at 06:05 PM.
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#5
Instructor
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For a very useful calculator, with diagram, that helps make sense of offsets and how it will affect your wheel placement, see:
http://www.1010tires.com/WheelOffsetCalculator.asp
http://www.1010tires.com/WheelOffsetCalculator.asp
#6
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Dave,
I believe the Spacing is all the same between the C2S, C4S and TT. I'm running Factory GT3 pattern wheels built for a my04-05 996 TT. Offset is 18x8 et50 in the front and 18x11 et45 in the rear. No spacer.
I believe the Spacing is all the same between the C2S, C4S and TT. I'm running Factory GT3 pattern wheels built for a my04-05 996 TT. Offset is 18x8 et50 in the front and 18x11 et45 in the rear. No spacer.
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#8
Racer
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hi,
i have just intsalled Techart 18" formula GT to my 4S and i have the original Techart "ABE/Teilegutachten" für the german TÜV
here's a picture, what techart suggest:
i have just intsalled Techart 18" formula GT to my 4S and i have the original Techart "ABE/Teilegutachten" für the german TÜV
here's a picture, what techart suggest: