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Newbie question- will these wheels fit my '00 996?

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I apologize as I know this has been asked, but I wanted to see if anyone had already installed a set of wheels such as these onto a narrow body 996...

C4S turbo twist wheels

Fronts are 225/40 ZR 18 N3, 18 X 8 with 50mm offsets P-zero assim.

Rears are 295/30 ZR 18 N3, 18 X 11 with 45mm offsets P-zero assim.

I did a search and saw similar questions with replies such as "...it should work..." but I was wondering if anyone knew firsthand that it would/wouldn't work.

If it did work did the install require any spacers?

Many, many thanks!

My car is a stock-suspended '00 C2 coupe 6 speed and is lightly driven. I may make it out to the twisties now and then but I keep things on the sane side. My car currently has the twist 17'' wheels (17x7, 17x9).

Edited by Chronos
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I have on my 1999 C2 - 18" Chrome Turbo Style one piece rims and they work great... I was told by the seller that they are OEM and not a nock off brand, but like you I am kinda a newbie...

This weekend I'll take a few close up pics and you can see what you think...

I'll post them in my garage section of the website:




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Thanks for the quick replies! I'm blown away.

What concerns me most is the offset. The 45 offset on the rears may be an issue with fit.

However, if these are the same as the millenium wheel then it appears the question is answered. These are factory wheels off of a C4S. On the Porsche website it looks like they are calle 415 18" Turbo Look II

Here's a thread where alter_schwede claims this offset will work: http://www.renntech.org/forums/index.php?s...st=0entry8842

"Yes, the 11Jx18 ET45 rims will fit but to be safe I would go for the standard 285/30 x 18 tires on the rims due to the ET45 and the back fender arche.

Note: it also depends on the tire Brands, Michelin 285/30 fits perfect, might getting some problem with PZero Rosso 285/30, cause they have seemly wide roll-area, meassured to 310mm."

I was wondering if this is an opinion and/or fact. I'll send Tony an IM and email too.

Edited by Chronos
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Yeah, they aren't the correct offset, but according to a post by Loren in: http://www.renntech.org/forums/index.php?s...st=0entry1802

"Here are the Porsche approved tires:

Tire Size

Front: 225/40 ZR 18

Rear: 285/30 ZR 18


- Bridgestone Potenza S-02A N3 Directional

- Continental Sport Contact 2 N2 Side-directional

- Michelin Pilot Sport N1 Directional

- Pirelli P-ZERO ROSSO N4 Side-directional

Approved 18 wheels (w/offsets) are:

- Front: 8J X 18 offset - 50.0/52.0

- Rear: 10J X 18 offset - 65.0

5 mm spacers are approved on all four wheels.

17 mm spacers on the rear wheels and 5 mm spacers on the front are also approved with use of proper (longer) wheel bolts.


With the 8" front wheel you can go 235/40 ZR 18 tire without any rubbing and it will reduce understeer a little. A couple of brands of 295/30 ZR 18 rear tires are reported to not rub (or require fender rolling) but I can't recommend any especially if you are lowering the car.

Perhaps you can tell if this is a street car or track car and others can recommend tire/wheel combinations for both"

In this thread GregTT replies:


One of the good things about buying custom wheels, is that you select the offset. If someone has a OE Carrera style wheels (which have 52 & 65mm offsets F/R) and they throw a 7mm spacer on the front and a 17mm on the rear, then they have an affective offset of 45 & 48.

Offset (or ET, which means 'pushed in') is decreased as you 'space' the wheel out."

If I read this correctly, but using an 18" wheel with a 17mm spacer you are almost at the same offset as the rears on the wheels I'm looking at. Hmm. :huh:

Loren, What do you think?

Edited by Chronos
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  • Admin

In order to use an 11" rear wheel on a narrow body car you will need to get the offset to 63 mm. Some tires will still rub but you are likely safe with the GT3 recommended tires as they are know by the factory to work on narrow body (GT3s) without rubbing.

Current recommended tires for the GT3 are:

235/40 Z 18 & 295/30 ZR 18 Michelin Pilot Sport TL N2 (Directional)

235/40 Z 18 & 295/30 ZR 18 Pirelli P-ZERO Rosso N5 (Directional)

235/40 Z 18 Pirelli P-ZERO Corsa N6 (Directional)

295/30 Z 18 Pirelli P-ZERO Corsa N6 (Directional & For Specified Side Only)

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C4S turbo twist wheels

Fronts are 225/40 ZR 18 N3, 18 X 8 with 50mm offsets P-zero assim.

Rears are 295/30 ZR 18 N3, 18 X 11 with 45mm offsets P-zero assim.

The front wheel will fit perfectly. But you'll need wheels with 63mm rim offset for the rear - The rear wheel from the C4S (with 45mm offset) will not fit. B)


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