Southpaw was correct. There are two different wheel options that look very close to identical if you don't know what your looking for. There is the standard gt3 and the gt3rs. I actually went with the non RS model as I didn't realize there was a difference. The offsets are 63 in the rear and 53 in the front. The wheels are 8.5 inches wide in the front and 12 inches wide in the rear. Both are 19 inch wheels.

The rs wheel is 9 inches in the front. It also weighs a little more. It's funny but I saw several guys claim different weights for these wheels. It makes a little more sense now, knowing there are some slight differences...

 

The OEM GT3 Centerlock Rears will not work on a 997.2 turbo rear as you lose 25mm clearance on the strut side from that change and it won't work. I looked into this years ago and was told by everyone on the forum and my tech that the 8.5" GT3 fronts will obviously work (as they allow 3mm more clearance) but you have to use GT3RS rears (and even then you lose 10mm on the inside clearance and extend 16mm on the outer side). So I have no idea what is on the turbo pictured in this thread but it can't be OEM GT3

 

Do you have problems of any kind in the rear with this setup? Physically, the car doesn't have that clearance in the rear..or at least mine didn't. I really want to switch to a different wheel than the Spyder CL so let me know how this is possible. Thanks

 

So, Domer's white Turbo has OEM GT3RS spec wheels all the way around?? I want to try this but want to make sure it works. Appears it does even with the clearance differences from stock as it doesn't look unusually tucked or pushed out. Do all think this works?

 

The white one above has the non RS wheels. You can see how the spokes are more flat (they don't go in) on the outside with the higher offset. Before making the purchase, I saw another car do this. It was a silver turbo s cab on eBay. It also had the non RS gt3 wheels. I always thought the higher offset allowed wheels to fit a smaller area while a more aggressive offset like the RS made it impossible. Hence the reason the non RS gt3 wheels fit in a smaller area. Is it possible you have the wheels switched? Higher offsets are always less aggressive.

 

After rereading Domer's posts it sounds like he does have the RS gt3 wheels all the way around. I think this might be the case because he mentioned going from an 8.5 inch wheel in the front to a 9 inch wheel. The RS wheel has a 9 inch wheel. The non RS gt3 wheel is 8.5 inch wheel.

Domer, you don't happen to have a receipt with a part number to confirm?

My understanding is a +/-5mm change from stock is never a problem. So the fronts shouldn't be an issue with either gt3 wheel. But you do have me wondering about the rears. My new non RS gt3 rear wheel is 1inch wider but it's 12mm more positive then the stock turbo s wheels. I'm wondering if the positive offset is countering the 1 inch wider wheel, hence the reason it works on a the regular gt3? If not, it could mean 25mm (for the increased width) plus another 12mm because of the more positive offset, which could pose a problem...

 

I am basing it on the difference between my stock wheel size/offsets and the GT3/GT3RS sizes/offsets with an offset calculator to determine the inner/outer clearance changes for each option.

I do agree that the pics of the White Turbo reflect a very flat wheel with less of the "dish" (concavity) I see on an OEM GT3RS -- and I do like a deeper concave look.

 

So I used the offset calculator as well and the changes in front are negligible but there is quite a difference in back. (Like you said earlier) The question is, is it too much? My guess is that I have a problem. The RS wheel provides for 9mm less space while the non RS provides for 25mm less space... ouch! I would need to shave quite a bit of the strut side of the wheel for it to work.

Any recommendations? Anyone... (besides buy new wheels)

 

The standard GT3 CL wheels should also work but they'll be sunken in more.
I ran GT3 wheels on my previous 997 turbo for several weeks.

 

I just confirmed it. I have a problem. These wheels will not fit my car...

 

Not so fast, my friend.... These users did it with no issues. I PM'd them about it too. As you can see, I've researched this extensively..

https://www.6speedonline.com/forums/...rs-wheels.html

https://www.6speedonline.com/forums/...rbo-build.html

 

yes, GT3RS

 

Yes, RS wheels will work with slight clearance issues; my point was that GT3 rears will not work.

 

This is true^

I was told the Gt3 wheels would work and saw several cars listing the upgrades without the "RS"
designation. Mine are the Gt3 non RS wheels, hence the reason I have a problem. Needless to say I'm looking for RS wheels. I'm also trying to sell my gt3 wheels that are sitting at the powder coaters prepped and ready for color. Meanwhile my car is sitting on jack stands...

 

whosdaddy,

I think you can still salvage your rear GT3 rims by going with Adjustable Upper/Lower Control Arms to move it out another 15mm. That will allow you to run the GT3 rims w/o rubbing the struts. You can also get Elephant Racing 15mm axle spacer to go with the Upper/Lower Control Arms arrangements.