When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Looking to put 20x12 rear wheels on my 991.2 narrow body (20x11.5 stock). I want to achieve the look on this Turbo here, if you notice the back wheels are quite deep. The only way to get this deep look is by going with 12+ wide wheels:
ADV1 tell me this:
Our engineering team states that your car is too narrow to fit the deep rear forging.
Using the deep forging would require an ET of +57mm. That will put the tire extremely close to the fender and you will risk rubbing.
We can make them, but you will have to assume the risk.
We have made some 991.2 wheels that are close to this spec. However, these cars are lowered, which tucks the tire further away from the fender.
It is not difficult to lower a Porsche 991.2. We believe it may be possible.
If you fit a 20mm spacer to your car right now, you will see how far we have to go to fit our deep rear profile.
It was built for the Turbo and Turbo S, and they are 15mm wider in the rear.
Will lowering the car by 25-30mm tuck in the top of the wheels by 20mm so as to prevent rubbing? How can I calculate that?
Last edited by Marcelo Delgado; 08-14-2018 at 03:33 AM.
You are never going to get that dished look because the hub face is further out relative to the fender on a narrow body car. If you want the tire closer to the fender lip, fit cup2 tires as they are wider even though they are the same 305 width.
Hopefully someone comes along and helps you with the 12in wide wheel fitment.
Never say never! Been looking into this. So they tell me they can do it, but It will get too close to the fender and can rub on a non-lowered car. I'm thinking I lower the car, which I was planning on, which will allow me to set the camber < -1.7 on the rear wheels to tuck in the top of the wheels enough to offset the amount that the wheels push out.
Thanks for the tip on the Cup2's, will probably go that route as well.
I'd recommend talking to HRE as well. Their rep here on the forums is HRE_Jurrian... or just call and ask for Jurrian. He's quite familiar with acceptable fitments and offsets for our cars.
It's not clear to me if you are looking for a deep dish look, where the spokes tilt in towards the center, or just a nice wide and clearly visible barrel. On a narrow body a deep dishing of the spokes will be tough.
Here are some examples of the 11.5" inch forged P101 wheels I had on my prior C4S and while they are certainly proportioned differently than a narrow body and the dishing of the spokes will be notably different, you get really deep and nicely finished barrels on the wheels which has a really nice look.
Looking to put 20x12 rear wheels on my 991.2 narrow body (20x11.5 stock). I want to achieve the look on this Turbo here, if you notice the back wheels are quite deep. The only way to get this deep look is by going with 12+ wide wheels:
ADV1 tell me this:
Will lowering the car by 25-30mm tuck in the top of the wheels by 20mm so as to prevent rubbing? How can I calculate that?
None of this make sense to me, but I'm not an expert. Seems some of the statements are the exact opposite of what you want. You can calculate where the wheel will sit. https://www.1010tires.com/Tools/Wheel-Offset-Calculator
The bigger the off set the further back the tire will sit. Spacers will bring it back out. Put in the current wheel size and offset, and the new wheel size and offset and see what it says. Then using spacers you can bring it further out.
Looking to put 20x12 rear wheels on my 991.2 narrow body (20x11.5 stock). I want to achieve the look on this Turbo here, if you notice the back wheels are quite deep. The only way to get this deep look is by going with 12+ wide wheels:
ADV1 tell me this:
Will lowering the car by 25-30mm tuck in the top of the wheels by 20mm so as to prevent rubbing? How can I calculate that?
Happy to come in and clarify, but honestly Evilfij below really hit the nail on the head. As he says, you will never going to get that dished look because the hub is further out relative to the fender on the narrowbody, whereas the Turbo is the opposite and can accept a much lower offset.
You're only thinking of the width which is the issue. Bigger widths by itself don't do anything for the conical profiles and how deep the wheel looks, the offset has more to do with that than anything else. The Narrowbody cars have much smaller fenders, and accepts a much higher offset compared to the Turbo. Factory offset on the Narrowbody is ET76 whereas the Turbo uses a ET52. The higher the offset, the more flat your wheel is going to be. The lower the offset, the more deep the wheel can be engineered to be.
If you absolutely must have that conical profile, that deep fitment there, I would either add fender flares or trade the car in for a Turbo. No way you're getting that deep profile with that low of an offset SAFELY (nor would it look good). Lowering the car helps, yes we have an adjusted offset which is calculated specifically for lowered cars, and a fitment specifically for OEM ride height, and even the lowered version is still a 11.5" width.
HRE does not recommend 12" wide on the rear of this car. Turbo's, yes, no biggie, but Narrowbody's using a 12" is a bit too much we feel. We recommend a 11.5" rear.
Originally Posted by evilfij
You are never going to get that dished look because the hub face is further out relative to the fender on a narrow body car. If you want the tire closer to the fender lip, fit cup2 tires as they are wider even though they are the same 305 width.
Hopefully someone comes along and helps you with the 12in wide wheel fitment.
Nail on the head.
Originally Posted by StormRune
I'd recommend talking to HRE as well. Their rep here on the forums is HRE_Jurrian... or just call and ask for Jurrian. He's quite familiar with acceptable fitments and offsets for our cars.
It's not clear to me if you are looking for a deep dish look, where the spokes tilt in towards the center, or just a nice wide and clearly visible barrel. On a narrow body a deep dishing of the spokes will be tough.
Here are some examples of the 11.5" inch forged P101 wheels I had on my prior C4S and while they are certainly proportioned differently than a narrow body and the dishing of the spokes will be notably different, you get really deep and nicely finished barrels on the wheels which has a really nice look.
When looking around at 991 wheels, stumbled across these 21s. Suspect the rears could be done for an NB car, though you'd lose some of the depth near the lugs.
Like them better in silver than the two-tone...and apologies in advance that I don't have the manufacturer's name handy. Iirc, when I found them, they were available in 20-inch sizing and there were some shots of them in an aluminum/clear finish on an NB C2 cab. Remember thinking it would have been better to see them in silver paint there, too. YMMV...
Looking to put 20x12 rear wheels on my 991.2 narrow body (20x11.5 stock). I want to achieve the look on this Turbo here, if you notice the back wheels are quite deep. The only way to get this deep look is by going with 12+ wide wheels:
ADV1 tell me this:
Will lowering the car by 25-30mm tuck in the top of the wheels by 20mm so as to prevent rubbing? How can I calculate that?
Marcelo Delgado,
20x12 on a narrow body 991.2 is possible and looks great. I just did on a Carrera T. We did a lot of calculations/ back-and-forth on offsets and went with the OEM +76. The stock 20x11.5 +76 tucks in a tad, now with a 20x12 +76 the setup is damn near flush. It looks perfect. I will try to get pictures up soon.
Simply put: 12" wide is possible on this car. The amount of concavity + dish seen on that 991 Turbo we did is not possible on this car.
We're the largest dealer in the world for custom forged wheels, if you need proper guidance on the fitment for your car give us a holler - David@WheelsBoutique.com
__________________
Wheels Boutique // 786 249 0127 //Sales@wheelsboutique.com
Follow us on YouTube: www.youtube.com/user/WheelsBoutique Largest Dealer In The World for HRE Wheels, ANRKY Wheels, Vorsteiner Wheels & Aero, Akrapovic Exhaust, & iPE Exhaust BBS, Forgeline, & TechArt Premium Dealer
Brembo / Rotiform / KW / H&R / Novitec / Brabus / Mansory and tons more...
20x12 on a narrow body 991.2 is possible and looks great. I just did on a Carrera T. We did a lot of calculations/ back-and-forth on offsets and went with the OEM +76. The stock 20x11.5 +76 tucks in a tad, now with a 20x12 +76 the setup is damn near flush. It looks perfect. I will try to get pictures up soon.
08-14-2018, 12:30 AM
Putting 12" wheels on narrow body 991.2
