The previous 981 and 987 wheels, and their aftermarket counterparts should fit. The issue is the larger rear wheel on the 718 vs previous gens
Correct -- hence the thread title "aftermarket" instead of "OEM".The previous 981 and 987 wheels, and their aftermarket counterparts should fit. The issue is the larger rear wheel on the 718 vs previous gens
All of the wheels listed in the OP's post are shown in the build your own Porsche web site.
I googled and found this list "Porsche 718 (982) Cayman & Boxster option and build codes" on this web site:
https://www.stuttcars.com/technical/option-codes/718-982/
this list shows build code " 433 20" 991.2 Carrera S wheels"
Note this is different from the OP's Careers S wheel as it clearly designate that it's 991.2 wheel. I looked that wheel up on the build your own Porsche website and it shows this:
Set of alloy wheels with five imposing open-ended spokes.911 Carrera models:Front: 8.5 J x 20 (ET 49) with 245/35 ZR 20 tyres,Rear: 11.5 J x 20 (ET 76) with 305/30 ZR 20 tyres911 Carrera 4 models:Front: 8.5 J x 20 (ET 49) with 245/35 ZR 20 tyres,Rear: 11.5 J x 20 (ET 56) with 305/30 ZR 20 tyres
The fronts are basically the same size but the rears are much larger. I want the largest set of factory size wheels i can get for SCCA Autocross.
So my question is does anyone know if this is correct? I question if an 11.5" wide wheel will actually fit, even with a 76mms offset?
My point with the wheels i identified is if this list is correct ( which I can not yet confirm) then the 991.2 wheels are SCCA legal and their availability suggests that Porsche says they will fit. I fully understand these are not 718 wheels, they are 991.2 so 911 wheels, but I'm only reading what the list says.
I'm also very suspect about how an 11.5" wheel will fit.... So the point of my question was has anyone tried anything that wide? I have a set of 12x18 from my GT3, I don't recall the offset but I intend to put them on the car and look for interference.
Thanks!
Correct... no question, only OEM wheels for the exact model are legal.
I apologize if I've been unclear... but my point is according to the list I linked, I can go into a Porsche dealership and order a new 718 Cayman S from the factory with 991.2 Carrera S wheels ( 911 Carrera S wheels, not 718 Carrera S wheels) as a factory build option for the 718. That makes those wheels OEM for the 718, and subsequently SCCA legal.
So again, my question is, is this list incorrect? and if it Is, has anyone tried to fit that large of a wheel?
I'm currently away from home but once I return I intend to try my GT3 18" track wheels on my 718 CS. I will post what I learn...
What’s the consensus with a 245-35-20 front and 285-35-20 rear winter tire set working on the Carrera S wheels? Seems like it’s not too far off from OEM with some extra sidewall and overall ground clearance.
I have 18" wheels on my 718 S. They are Forgestar F14: 18x8.5et55 and 18x10et45. No problems at all for brake clearance. I use these wheels for tracking because there are so many more choices for tire brands and compounds with 18" wheels vs. any other sizes.Correct -- hence the thread title "aftermarket" instead of "OEM".![]()
However, I would be careful regarding aftermarket 987 fitments for two reasons:
- The 1/2" larger rear rim widths
- The change in brake outfitting for the 718:
718 Cayman/Boxster brakes = 987 Cayman/Boxster S brakes
718 Cayman/Boxster S brakes = 991.1 911 Turbo brakes
This is precisely why Porsche OEM 18" rims won't fit the 718 "S" models. That's the big unknown here: those who want to track/AutoX/winter-tire your 718 "S" cars will be hard-pressed to find an off-the-rack aftermarket 18" rim that will work. You'll have to research 991.1 Turbo fitments as a start.
Fair warning, this is probably a stupid question!
I've got these laying around, would it work for track days only? I'm sure there's a concern with the fender clearance and it looking pretty weird, but it would save me a ***** for track wheels. Thanks!
Tesla 21" Arachnid wheels:
Size: 21X8.5" front, 21X9.0" rear.
Offset: +40 front, +40 rear
PCD: 5X120
Center Bore: 64.1mm
Weight: 21x8.5" = 27.85 lbs (without tire), 21x9.0" = ~ 28.75 lbs (without tire)
Lug Nut Spec: 13/16 Hex, 14X1.50 Thread
Lug Nut Torque Spec: 129 lb-ft