For 2002-2005 Porsche 996 911 C4S & Turbo Widebody
Vehicles Covered in this Guide
2002-2005 Porsche 996 911 C4S, Turbo & Turbo S, Widebody Chassis
* Click here to view our 996 GT2 guide
12" Rear Wheel Clearance Information
12" rear wheels come standard on the 996 GT2 and are a popular upgrade for 996 Turbo owners due to their ability to support the sidewalls of wide 305, 315 & 335 tire compounds. With that said, these wide wheel & tire configurations will take up all of the available real estate under the rear fender wells, so aftermarket turbo/intake setups may cause interference.
Brake Clearance Information
In the engineering phase of wheel development we 3D scan factory brakes and review 2D aftermarket brake templates in order to optimize our barrel profiles and spoke curvatures. As a result, our wheels offer massive brake clearance so you can run the smallest possible wheel diameter.
Available Wheel Designs (click images to enlarge)
| Forged Designs | Flow Formed Designs | |
|
VS-5RS |
EC-7RS |
SM-10 |
| Bolt Pattern | Center Bore | Lug Seat | Thread Pitch |
| 5x130mm | 71.6mm | R14 Ball Seat | M14x1.5mm |
OEM+
Easy upgrades for street-driven cars
These bolt-on wheel fitments are ideal for enthusiasts enjoying their car day-to-day on the street, and they are typically paired with All-Season or performance oriented Summer tires.These wheel and tire configurations will improve the appearance and performance of the car without requiring modifications or adjustments to the factory alignment. Just bolt-on and enjoy!
While these wheel fitments can be used for track days and AutoX, performance will be left on the table. Drivers that prioritize performance should review our Performance Street & Track and/or Hardcore Track & Race sections below.
Wheels
- Front: 18x8.5” ET45 // Rear: 18x12” ET45
- Available in: SM-10
- Popular fitment
- 3mm spacers required up front for caliper clearance
Tires
- APEX Staff Pick: Front: 235/40-18 // Rear: 315/30-18
- Factory GT2 tire sizes
- Typically a direct fit
- Rear fender rolling may be required
- Max Performance Summer: Michelin Pilot Sport PS2 (220 TW)
- Extreme Performance Summer: Yokohama A052 (200 TW), Nankang CR-1 (200 TW), Falken RT660 (200 TW)
- Alternative: Front: 245/40-18 // Rear: 315/30-18
- Typically a direct fit
- Rear fender rolling may be required
- Max Performance Summer: No options currently available
- Extreme Performance Summer: Yokohama A052 (200 TW), Nankang CR-1 (200 TW), Falken RT660 (200 TW), Continental Extremecontact Force (200 TW)
Performance Street & Track
Wider fitments for enhanced performance
Whether you enjoy spirited street driving or you are a weekend track warrior chasing lap times, these wheel & tire configurations improve the appearance and performance of the car without requiring a bunch of modifications. In the rear, you have your choice of 11" or 12" wheel widths depending on how much power the car has and what rear tire size you want to support.
Wheels
- Front: 18x9” ET46 // Rear: 18x12” ET45 or ET46
- Available in: SM-10, EC-7RS, VS-5RS
- Popular fitment
Tires
- APEX Staff Pick: Front: 245/40-18 // Rear: 315/30-18
- Typically a direct fit, but we encourage a little additional negative camber
- Rear fender rolling may be required
- Max Performance Summer: No options currently available
- Extreme Performance Summer: Yokohama A052 (200 TW), Nankang CR-1 (200 TW), Falken RT660 (200 TW), Continental Extremecontact Force (200 TW)
- R-Compound: Nitto NT01 (100 TW), Toyo R888R (100 TW), Nankang AR-1 (100 TW)
- Alternative 1: Front: 235/40-18 // Rear: 315/30-18
- Factory GT2 tire sizes
- Typically a direct fit
- Rear fender rolling may be required
- Max Performance Summer: Michelin Pilot Sport PS2 (220 TW)
- Extreme Performance Summer: Yokohama A052 (200 TW), Nankang CR-1 (200 TW), Falken RT660 (200 TW)
- R-Compound: Nitto NT01 (100 TW), Toyo R888R (100 TW), Nankang AR-1 (100 TW)
- Alternative 2: Front: 255/35-18 // Rear: 315/30-18
- A minimum of -2º front camber is recommended
- Rear fender rolling may be required
- Max Performance Summer: No options currently available
- Extreme Performance Summer: Yokohama A052 (200 TW), Nankang CR-1 (200 TW), Falken RT660 (200 TW)
- R-Compound: Toyo R888R (100 TW), Nankang AR-1 (100 TW)
Dedicated Track/Race Fitments
These fitments are best suited for weekend track warriors and competitive club racers looking to maximize grip and overall performance. They incorporate wider 9” front wheels (or 10" if you are real hardcore) which provide superior tire sidewall support over the more "generic" 8.5" options listed in the section above. A wider front wheel and tire combination will increase front end grip and close the stagger from front to rear resulting in sharper turn-in and less understeer. This is one of the easiest and most effective improvements you can make to your Porsche from a handling perspective.
We've optimized the offset of our 9" front wheels to to work well with the stock fenders, however, a wide variety of tire compounds can be used and some may require negative camber to fit properly. See fitment notes under each tire configuration below to see if modifications are required. If you plan to track your car, we highly recommended dialing in negative camber regardless of whether your wheel/tire fitment requires it for fender clearance. Negative camber is vital for extracting the most performance and longevity out of your tires, and without the proper amount the outer shoulders of your tires will wear out prematurely and running tire costs will dramatically increase.
Wheels
- Front: 18x9” ET46 // Rear: 18x12” ET45 or ET46
- Available in: SM-10, EC-7RS, VS-5RS
- Popular fitment
Tires
- APEX Staff Pick: Front: 255/35-18 // Rear: 315/30-18
- A minimum of -2º front camber is recommended
- Rear fender rolling may be required
- Extreme Performance Summer: Yokohama A052 (200 TW), Nankang CR-1 (200 TW), Falken RT660 (200 TW)
- R-Compound: Toyo R888R (100 TW), Nankang AR-1 (100 TW)
- Semi-Slick: Hoosier R7/A7 (40 TW), Toyo RR (40 TW)
- Alternative 1: Front: 245/40-18 // Rear: 315/30-18
- Typically a direct fit, but we encourage a little additional negative camber
- Rear fender rolling may be required
- Extreme Performance Summer: Yokohama A052 (200 TW), Nankang CR-1 (200 TW), Falken RT660 (200 TW), Continental Extremecontact Force (200 TW)
- R-Compound: Nitto NT01 (100 TW), Toyo R888R (100 TW), Nankang AR-1 (100 TW)
- Semi-Slick: Hoosier R7/A7 (40 TW), BFG R1S (40 TW)
- Alternative 2: Front: 235/40-18 // Rear: 315/30-18
- Factory GT2 tire sizes
- Typically a direct fit
- Rear fender rolling may be required
- Extreme Performance Summer: Yokohama A052 (200 TW), Nankang CR-1 (200 TW), Falken RT660 (200 TW)
- R-Compound: Nitto NT01 (100 TW), Toyo R888R (100 TW), Nankang AR-1 (100 TW)
- Semi-Slick: No options currently available
- Alternative 3: Front: 245/645-18 // Rear: 305/645-18
- A minimum of -3º of front & -2.2º rear camber is recommended
- Rear fenders may need to be rolled
- Racing Slicks: Pirelli DH
- Alternative 4: Front: 245/645-18 // Rear: 305/660-18
- A minimum of -3º of front & -2.2º rear camber is recommended
- Rear fenders may need to be rolled
- Racing Slicks: Pirelli DH
- Alternative 5: Front: 265/645-18 // Rear: 325/660-18
- A minimum of -3º of front & -2.2º rear camber is recommended
- Rear fenders may need to be rolled
- Racing Slicks: Pirelli DH
Wheels
- Front: 18x10” ET36 // Rear: 18x12” ET45 or ET46
- Available in: SM-10, EC-7RS, VS-5RS
- Motorsport oriented suspension with a slim silhouette (short linear 2.25mm or 60mm springs) must be used for maximum inner clearance.
- Front & rear fenders must be rolled
- Radiator brackets must be trimmed and mounting holes slotted so it can be moved forward slightly. Then reshape fender liners.
- Shorter GT2 rear fender liner brackets are ideal. Then reshape fender liners.
Tires
- APEX Staff Pick: Front: 275/35-18 // Rear: 335/30-18
- A minimum of -3.8º front & -3º rear camber is recommended
- Extreme Performance Summer: BFG Rival S 1.5 (200 TW)
- R-Compound: Nitto NT01 (100 TW), Toyo R888R (100 TW)
- Semi-Slick: Hoosier R7/A7 (40 TW)
- Alternative 1: Front: 265/35-18 // Rear: 315/30-18
- A minimum of -3.8º front & -2.2º rear camber is recommended
- Extreme Performance Summer: Yokohama A052 (200 TW), Falken RT660 (200 TW)
- R-Compound: Toyo R888R (100 TW)
- Semi-Slick: No options currently available
- Alternative 2: Front: 275/35-18 // Rear: 315/30-18
- A minimum of -3.8º front & -2.2º rear camber is recommended
- Extreme Performance Summer: Falken RT660 (200 TW), BFG Rival S 1.5 (200 TW), Continental Extremecontact Force (200 TW)
- R-Compound: Nitto NT01 (100 TW), Toyo R888R (100 TW)
- Semi-Slick: Hoosier R7/A7 (40 TW)
- Alternative 3: Front: 265/645-18 // Rear: 325/660-18
- A minimum of -3.5º front & -2.2º rear camber is recommended
- Rear fenders may need to be rolled
- Racing Slicks: Pirelli DH
Additional Resources
Brake Clearance Information
In the engineering phase of wheel development we 3D scan factory brakes and review 2D aftermarket brake templates in order to optimize our barrel profiles and spoke curvatures. As a result, our wheels offer massive brake clearance so you can run the smallest possible wheel diameter. The following brakes have been tested and confirmed to clear our wheels.
- OEM 380mm 6-pot PCCB - fits all
- Brembo 1M1.9006A1, 380mm 6-pot - fits 18x9" ET46 only
- Brembo 1M1.9005A1, 355mm 6-pot - fits all
- StopTech 83.780.4700.61 355mm 4-pot - fits all
- StopTech 83.781.6900.XX, 380mm 6-pot - call to confirm
Should I Dial in Negative Camber, and How Much is Right for me?
Whether you are a casual weekend track warrior that still enjoys your car on the street, or a hardcore racer competing for a spot on the podium, negative camber is a vital part of chassis setup that has many benefits. Not only will adding negative camber create more room for wider wheel and tire configurations, it more importantly improves handling, turn-in and tire longevity. Learn more in our blog article, The Positives of Negative Camber.
Still have questions?
Fill out our Fitment Recommendation form
Call us: 925-245-0773
Email us: support@apexraceparts.com