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Can I put 20" wheels/tires on my 2005 997?

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Old 05-17-2018, 08:19 PM
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Carolina Girl
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Default Can I put 20" wheels/tires on my 2005 997?

I have tried researching this topic extensively so I would not have to post, but I can't seem to find a definitive answer.

I have a 2016 Panamera and a 2005 911 Carrera S, on which 19" wheels are stock.

This is my second Panamera, and the first one came with the most horrifying set of 18" girlie wheels/rims, that I treated myself to a set of OEM 20" Turbo II wheels and tires.

When I returned the lease car with its original wheels and got a new Panamera. I kept the set I bought as the new Panamera came with nice 20" wheels/tires. The ones I bought have been sitting, and the 911 now needs new tires, and I think the Turbo II wheels would look pretty hot on there.

The bolt pattern works, and the bolt length is doable. I called the dealership, and the tech said it would work, but the svc person said it would not as it's not spec.

So, what is everyone's thoughts on this? Would they scrub the wheel well? Be a safety issue? Or is it possible to put 20's on there?

Tires are 255/40's and 295/35's

Thanks!
Old 05-17-2018, 08:26 PM
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love2drive
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Default No

http://sharkwerks.com/porsche/porsche-modification-and-tuning-guide/469-997-2-carrera-s-4-4s-gts-2009-2012-a.html

Old 05-17-2018, 08:39 PM
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Fined
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depending on the wheel width 20s should fit. you'll need to mind the offsets and wheel width. some people like the look. I'd imagine a 20" set of wheels for a Panamera will be heavy on a 911. It's kind of preposterous, in my view, to put large heavy wheels on a sports car. But I don't think it's a safety issue so long as the wheels fit.

the car will be a better 911 (every single time) with lighter wheels and ones optimized with the wheel/tire sizing ratio that it was designed to have. Not saying anyone needs to stick to OE sizes of tires or wheels, simply that the ratio front to back of the sizes should be close to an OE fitment for a 911 with the same chassis.


check out this instrumented test (if you're into data);

https://www.caranddriver.com/feature...d-tires-tested

Last edited by Fined; 05-17-2018 at 08:57 PM. Reason: adding instrumented test
Old 05-17-2018, 09:06 PM
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Carolina Girl
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I have to be completely honest here (even though I know this view won't be popular).

I agree it's not the same and that performance will suffer and that it won't retain the purist look we all know and love. It's purely a financial decision.

I spent a LOT of money for these tires, and they are literally brand new with the nubs still on them and just sitting. I really hate to spend another $1600 for new tires for the 911 when I have these.

Ideally, I would sell the wheels/tires I had on the Panamera and just get new tires for the existing 19" 911 wheels, but I hate to spend more on top of the $1600 for tires and $3000 for wheels and have them just sitting around if I could use them on the 911.

My plan would be to use this combo until I need new tires again and go back to the original 19's and sell the Panamera wheels alone.
Old 05-17-2018, 09:35 PM
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Just because you can, doesn't mean you should . . .
Old 05-17-2018, 11:25 PM
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j beede
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My 997.1 C2 with 20x11 and 20x8.5 OZ Ultraleggera (24/27 lbs.). No spacers. P-Zero (N) 295/30-20 and 245/30-20. Ride, noise, turn-in, cornering... all wonderful. Compare these weights to what Tire Rack reports for :
BBS CH-R 19": 24/27 lbs.
Starke BC 19": 22/26 lbs.

Starke FC 19": 24/28 lbs.
Starke SC19: 28/30 lbs.
Sport Edition CUP 4 19": 26/33 lbs.


Yes, cheap wheels are heavy. I haven't tracked down the difference in weight between a P-Zero in 295/30-20 vs. 295/35-19. I suspect the lower profile tire will weigh less given the outer diameters are (necessarily) equal. I wonder what size wheels come on a 2018 997?
Old 05-18-2018, 01:51 AM
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rw229
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I won't comment on the diameter as some like 20's on the 997, but we would have to know the wheel widths and offsets to comment on the fit. Even without that info, those tires seem like they are too tall (40/35 aspect ratio) and there is no way you are going to fit a 255 on the front.

Originally Posted by Carolina Girl
I have tried researching this topic extensively so I would not have to post, but I can't seem to find a definitive answer.

I have a 2016 Panamera and a 2005 911 Carrera S, on which 19" wheels are stock.

This is my second Panamera, and the first one came with the most horrifying set of 18" girlie wheels/rims, that I treated myself to a set of OEM 20" Turbo II wheels and tires.

When I returned the lease car with its original wheels and got a new Panamera. I kept the set I bought as the new Panamera came with nice 20" wheels/tires. The ones I bought have been sitting, and the 911 now needs new tires, and I think the Turbo II wheels would look pretty hot on there.

The bolt pattern works, and the bolt length is doable. I called the dealership, and the tech said it would work, but the svc person said it would not as it's not spec.

So, what is everyone's thoughts on this? Would they scrub the wheel well? Be a safety issue? Or is it possible to put 20's on there?

Tires are 255/40's and 295/35's

Thanks!
Old 05-18-2018, 09:24 AM
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Petza914
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Sell those off and get a proper setup for the 911,which means 19s, not 20s, and with the correctly sized tires - 235/35 in the front and 305/30 in the rear.

I have forged, lightweight Champions for sale that come with tires. Fronts are perfect - rears should be replaced, and if you're in the Carolinas, probably within driving distance to me to save you the cost of shipping (I'm near Clemson in SC).
Old 05-18-2018, 09:57 AM
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JABowders
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My 2005 997.1 runs the Stock 19" Wheels (Carrera S light alloy wheels 'Lobster Claw')

Front Wheel Size 19 x 8 - Front Tire Size P235/35ZR19
Rear Wheel Size 19 x 11 - Rear Tire Size P295/30ZR19

I spend a bit of time in the Porsche Corrals, looking at the number of cars with 20" wheels and I thought of picking up a set, they do look nice but ... as much as I like them for the continued future I'll stick to the 19s.

Maybe you can arrange a swap or sale for the others though pca or here.

Best of luck.
Old 05-18-2018, 08:55 PM
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Jeremy Hazeltine
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This always gets me.... my 996 came with 18”, i put 19” on and it looked great. People said don’t do it 19” is too big.....the 997 (virtually the same car) came on 19” stock, and people say don’t fo 20”, its too big.
we know the next gen, 991, has 20” factory right? ��
IMO do it if you like it, its your car
Old 05-18-2018, 09:26 PM
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Originally Posted by love2drive
http://sharkwerks.com/porsche/porsche-modification-and-tuning-guide/469-997-2-carrera-s-4-4s-gts-2009-2012-a.html

good grief i read that page and it is amazing the amount of bs in that marketing propaganda. Theres a good 30% of misinformation.

mike
Old 05-18-2018, 10:53 PM
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Originally Posted by Jeremy Hazeltine
.
we know the next gen, 991, has 20” factory right?
Correct, but the 991 is a larger car (both a longer wheelbase and wider track) with differently shaped wheel arches, and it was developed using the 20" wheels for the electronic nannies like PSM, PTV, etc. and because of that use an appropriately sized sidewall. To put 20s on a 997 you have to run such a low aspect ratio that aside from it not looking right or good, it compromises the streetability and performance of the car, but as you say, it's their car and people should feel free to do what they want yo it.
Old 05-18-2018, 11:04 PM
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Originally Posted by Petza914
Correct, but the 991 is a larger car (both a longer wheelbase and wider track) with differently shaped wheel arches, and it was developed using the 20" wheels for the electronic nannies like PSM, PTV, etc. and because of that use an appropriately sized sidewall. To put 20s on a 997 you have to run such a low aspect ratio that aside from it not looking right or good, it compromises the streetability and performance of the car, but as you say, it's their car and people should feel free to do what they want yo it.
235/30/20 and 295/25/20 keeps pretty much the same diameter as stock 19s with 35/30 ratios and while it seems more extreme now in a few years i have no doubt they will be common sidewall ratios just like our 30 series rubber was extremely rare 10 years ago.

thats if were interested in keeping the same diameter as a carrera or s. The 997 gt2 runs 325/30/19 in the rear which is considerably bigger than a 295/25/20
Old 05-19-2018, 05:32 PM
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These are 20's, and the car looks pretty sick to me.


http://brixtonforged.com/black-porsc...m16-rose-gold/

Old 05-19-2018, 06:23 PM
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Originally Posted by swoardrider
These are 20's, and the car looks pretty sick to me.


http://brixtonforged.com/black-porsc...m16-rose-gold/

Yup, looks like a 997 on 20s... wheels visually too large and too much poke (offset), and the stretched tire look too where the rim is actually protruding past the tire. If you put a straight edge across the outer edge of the wheel and tire and it contacts the wheel / tire at the top instead if touching the fender, that's too far out.

Unfortunately this seems to be a new trend as the price of 997s come down, or maybe when I wasn't looking I got old. LOL.


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