981 SCCA AStreet Wheel options for 19"
01-15-2019, 01:09 PM
#1
981 SCCA AStreet Wheel options for 19"
This thread is for those planning to run a 981 GTS in AStreet (or an S but with the widest wheels possible). I have been having some difficulty finding 19" wheel options that are legal offset in the widest 8.5/10 widths. I also can not find any documentation that 5mm spacers were legal but if someone can provide this wheel options would improve DRAMATICALLY. In the absence of that...
OEM wheels were:
Front 20x8.5 +57
Rear 20x10 +50
Legal 19" wheels would have to be:
Front 19x8.5 with an offset of +50 or greater
Rear 19x10 with an offset of +43 or greater.
I can not find a single off the shelf wheel option that has legal offsets front and rear. On the GT4 I had OZ wheels and had to machine the mounting pad down 1mm to have legal offset so modifying offset is possible but likely only 1-2mm safely and each wheel would be different to determine safety in doing so. So below are the options I've explored...
Forgestar CF5 - These are custom ordered but Forgestar claims the CF5 are the only wheel center they sell that can clear the brakes at a +50mm offset in the front.
NEW
MOMO RF Series - These are custom ordered and they claim they can clear the front 981 brakes with a +50 offset for the RF20 and RF5C wheels. I never asked about the RF10.
OZ Leggera (and others) - These have legal offsets in the front but all 19x10 wheels have a +40mm offset which would require 3mm of shaving which is getting iffy for sure.
Victor Equipment Wheels - All the 19x10 Victor wheels have a legal rear offset of +50mm but all the front 19x8.5 are not legal at +45 and 5mm shaving is definitely out of the question.
TireRack Sport Edition Wheels - Turbo Twist reps and heavy...19x8.5 +54mm and 19x10 +42mm These have legal offset front and are just 1mm away from legal offset rear so definitely doable I feel...and cheap.
Niche Essen - 19x8.5 +48 and 19x10+48 these are just 2mm away from being legal in the front (assuming the spokes would still clear the calipers afterwards). Would have to determine if comfortable shaving 2mm from these pads. Does anyone have these wheels on their Cayman that could check clearances?
Hartmann Fuch reps - 19x8.5 +48mm and 19x10 +47mm again are 2mm away from being legal in the front assuming the spokes would still clear the calipers afterwards. Would have to determine if comfortable shaving 2mm from these pads. Does anyone have these wheels on their Cayman that could check clearances?
Wheel Dynamics OS Design II - 19x8.5 +48mm and 19x10 +47mm these might be the same manufacture of the wheels above. All the same applies. Does anyone have these wheels on their Cayman that could check clearances?
OEM Cayman 987 Carrera Sport Wheels - These are heavy. 19x8.5 +55mm and 19x10 +42mm. These are just 1mm away from legal offset on the rear so definitely doable...if you want to modify a relatively rare set of OEM Porsche wheels...
Random Chinese something - Here's a link. I know nothing of these or their quality or the company selling them. The rear would have to be shaved 1mm which would definitely be doable. Does anyone have these wheels and can speak of their experience with them?
If anyone has any other options beside full out custom wheels, love to see it posted here.
OEM wheels were:
Front 20x8.5 +57
Rear 20x10 +50
Legal 19" wheels would have to be:
Front 19x8.5 with an offset of +50 or greater
Rear 19x10 with an offset of +43 or greater.
I can not find a single off the shelf wheel option that has legal offsets front and rear. On the GT4 I had OZ wheels and had to machine the mounting pad down 1mm to have legal offset so modifying offset is possible but likely only 1-2mm safely and each wheel would be different to determine safety in doing so. So below are the options I've explored...
Forgestar CF5 - These are custom ordered but Forgestar claims the CF5 are the only wheel center they sell that can clear the brakes at a +50mm offset in the front.
NEW
MOMO RF Series - These are custom ordered and they claim they can clear the front 981 brakes with a +50 offset for the RF20 and RF5C wheels. I never asked about the RF10.
OZ Leggera (and others) - These have legal offsets in the front but all 19x10 wheels have a +40mm offset which would require 3mm of shaving which is getting iffy for sure.
Victor Equipment Wheels - All the 19x10 Victor wheels have a legal rear offset of +50mm but all the front 19x8.5 are not legal at +45 and 5mm shaving is definitely out of the question.
TireRack Sport Edition Wheels - Turbo Twist reps and heavy...19x8.5 +54mm and 19x10 +42mm These have legal offset front and are just 1mm away from legal offset rear so definitely doable I feel...and cheap.
Niche Essen - 19x8.5 +48 and 19x10+48 these are just 2mm away from being legal in the front (assuming the spokes would still clear the calipers afterwards). Would have to determine if comfortable shaving 2mm from these pads. Does anyone have these wheels on their Cayman that could check clearances?
Hartmann Fuch reps - 19x8.5 +48mm and 19x10 +47mm again are 2mm away from being legal in the front assuming the spokes would still clear the calipers afterwards. Would have to determine if comfortable shaving 2mm from these pads. Does anyone have these wheels on their Cayman that could check clearances?
Wheel Dynamics OS Design II - 19x8.5 +48mm and 19x10 +47mm these might be the same manufacture of the wheels above. All the same applies. Does anyone have these wheels on their Cayman that could check clearances?
OEM Cayman 987 Carrera Sport Wheels - These are heavy. 19x8.5 +55mm and 19x10 +42mm. These are just 1mm away from legal offset on the rear so definitely doable...if you want to modify a relatively rare set of OEM Porsche wheels...
Random Chinese something - Here's a link. I know nothing of these or their quality or the company selling them. The rear would have to be shaved 1mm which would definitely be doable. Does anyone have these wheels and can speak of their experience with them?
If anyone has any other options beside full out custom wheels, love to see it posted here.
Last edited by Sprockett; 01-22-2019 at 07:02 PM. Reason: Added new option
01-15-2019, 02:35 PM
#2
Rennlist Member
I was never able to find an OTS SCCA legal 19” setup for my 981, so I splurged on Forgelines (which will be for sale sometime in March when I get my new wheels mounted up.) 
. Other than that, Forgestar may be your most affordable option. Good luck!
. Other than that, Forgestar may be your most affordable option. Good luck!
01-15-2019, 02:46 PM
#3
pm me details about your wheels. I will be interested.
01-15-2019, 05:03 PM
#5
01-15-2019, 09:58 PM
#7
Drifting
Trending Topics
01-16-2019, 03:40 PM
#8
01-19-2019, 12:53 PM
#10
Thanks for info. We’re these created for SCCA competition on a 981? With the +50 offset does the front Center cap still fit over the hub?
01-19-2019, 01:12 PM
#11
and will be getting the tires mounted on Monday. I'll be curious to see how much camber I can get without the tires rubbing.
01-19-2019, 05:41 PM
#12
Cool. So you went with minimum offset front and rear? +50 and +43? What size tires do you plan to run?
01-19-2019, 06:28 PM
#13
01-20-2019, 07:33 PM
#14
G
I’ll be trying 265/305...guess we’ll see how it goes.
Those I talked to on the forgestar s were pretty conservative thinking only the CF5 has the clearance at +50 to clear the brakes. I’d be curious what the clearance looks like on your wheels when you mount them.
Those I talked to on the forgestar s were pretty conservative thinking only the CF5 has the clearance at +50 to clear the brakes. I’d be curious what the clearance looks like on your wheels when you mount them.
