HRE Performance Metallic Gray 10-Spoke Forged Wheels
Porsche 911 / BMW M3 G80 Fitment · 5-Lug
2012 Porsche 911 GT3 RS 4.0 Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Porsche 911 GT3 RS 4.0 wheels? This page gives the 2012 Porsche 911 GT3 RS 4.0 bolt pattern, centre bore, factory rim size and the offset range for aftermarket and forged Porsche 911 GT3 RS 4.0 rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2012 Porsche 911 GT3 RS 4.0 uses centre-lock hubs (one central nut per wheel) with a 71.6 mm centre bore. Factory wheels: F: 19x8.5J R: 19x12.0J. For aftermarket wheels, 18x9.0J ET46 front / 18x12.0J ET46 rear sits flush and 18x10.0J ET36 front / 18x12.0J ET46 rear is the most aggressive fit.
Forged wheels for the 2012 Porsche 911 GT3 RS 4.0, built to the offset you choose. From $220 per wheel, made to order in about 25 days.
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Porsche 911 GT3 RS 4.0 (2012): Centerlock bolt pattern, 71.6mm center bore. Factory wheels: F: 19x8.5J R: 19x12.0J. Reference fitment ranges.
Bolt PatternCenterlock
Wheel Bolt/NutCentre-lock single nut (600 Nm, 3/4in drive)
Center Bore71.6mm
Wheel Load Rating700–850 kg/wheel (Performance / Sports Car segment reference)
Caliper TypeFixed 6-piston front caliper (OEM, Porsche GT/RS)
Year2012
CategorySports Coupe
Data check: the bolt pattern and center bore on this page have not yet been confirmed by a second independent source. Measure your hub or ask us before ordering. How we verify
Built to order by ANKUSI — IATF 16949 & ISO 9001 certified forged wheel manufacturer, TÜV/SFI/VIA compliant. See our factory & certifications →
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Flush Fitment | F 18x9.0J ET46 / R 18x12.0J ET46 |
| Maximum Aggressive | F 18x10.0J ET36 / R 18x12.0J ET46 |
Forged wheels for the Porsche 911 GT3 RS 4.0Machined to the factory bolt pattern and 71.6 mm bore · 14–24 inch · offset calculated for your car · 3D drawing before production
How to Read Wheel Offset & Measurements
Use these two references before ordering: the left diagram shows where each spec (PCD, center bore, offset, width and diameter) is measured on the wheel; the right diagram shows how positive, zero and negative offset shift the wheel face relative to the hub centerline.
ANKUSI Engineering Expert Advice
The Porsche 911 GT3 RS 4.0's chassis tuning assumes a certain amount of rotational mass at each corner. Forging lets ANKUSI cut that mass while matching the factory strength rating, which sharpens turn-in and reduces the energy the brakes have to absorb — a real gain on a coupe platform, not just a styling change.
The Porsche 911 GT3 RS 4.0 runs a Centerlock bolt pattern, 71.6mm center bore, and a F: 19x8.5J wheel from the factory. Our Flush Fitment reference is F 18x9.0J ET46 / R 18x12.0J ET46, which tucks the tire under the fender lip on a stock-height Porsche 911 GT3 RS 4.0. Our Maximum Aggressive reference is F 18x10.0J ET36 / R 18x12.0J ET46 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Porsche 911 GT3 RS 4.0 OE Wheel Specs
The 2012 Porsche 911 GT3 RS 4.0 (Sports Coupe) uses a Centerlock bolt pattern with a 71.6mm center bore. Factory wheels are F: 19x8.5J R: 19x12.0J.
Why the factory spec works for most owners:
- Keeps unsprung weight low to preserve the factory handling balance
- Matches the wider, performance-oriented tire sizing typical of this platform
- Maintains clearance for the factory brake package and suspension geometry
- Balances grip with ride comfort for daily and spirited driving
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Porsche 911 GT3 RS 4.0 (2012) we cut the centre bore to 71.6mm on our own CNC line, so the wheel hub-centres on the car with no spacer rings, in whatever diameter, width and offset you specify.
Converting these ET figures to backspacing? Use the wheel offset and backspacing calculator.
The figures on this page are part of our open wheel fitment dataset — 10,093 vehicles, free to download, CC BY 4.0.
Flush Fitment
For a flush look, F 18x9.0J ET46 / R 18x12.0J ET46 is a commonly used starting point — clearance must be verified on a stock or mildly lowered Porsche 911 GT3 RS 4.0.
Maximum Aggressive Fitment
F 18x10.0J ET36 / R 18x12.0J ET46 is a more aggressive reference setup. Beyond this, expect rubbing under compression without fender rolling or camber correction.
5-Tier Configuration Options
A
Factory-Style
F 19x8.5J ET47 / R 19x12.0J ET48Recommended setup: F 19x8.5J ET47 / R 19x12.0J ET48 | Economy impact: Negligible | Best for: Daily commuting, family use
Appearance: 7/10 | Comfort: 9.5/10 | Install difficulty: ★☆☆☆☆
Estimated cost: $1,200-1,500 (wheels + tires + install)
B
Comfortable Upgrade
F 19x9.0J ET47 / R 19x12.0J ET47Recommended setup: F 19x9.0J ET47 / R 19x12.0J ET47 | Economy impact: -2 to -4% | Best for: Daily / street
Appearance: 8/10 | Comfort: 9/10 | Install difficulty: ★☆☆☆☆
Estimated cost: $1,950-2,550 (wheels + tires + install)
C
Balanced / Flush Fit
F 18x9.0J ET46 / R 18x12.0J ET46Recommended setup: F 18x9.0J ET46 / R 18x12.0J ET46 | Economy impact: -4 to -6% | Best for: Street
Appearance: 8.5/10 | Comfort: 8/10 | Install difficulty: ★★☆☆☆
Estimated cost: $2,600-3,400 (wheels + tires + install)
D
Aggressive
F 18x9.5J ET41 / R 18x12.0J ET46Recommended setup: F 18x9.5J ET41 / R 18x12.0J ET46 | Economy impact: -6 to -9% | Best for: Show / occasional track
Appearance: 9/10 | Comfort: 6.5/10 | Install difficulty: ★★★☆☆
Estimated cost: $3,900-5,000 (wheels + tires + install)
E
Max Aggressive
F 18x10.0J ET36 / R 18x12.0J ET46Recommended setup: F 18x10.0J ET36 / R 18x12.0J ET46 | Economy impact: -8 to -12% | Best for: Show only
Appearance: 9.5/10 | Comfort: 4/10 | Install difficulty: ★★★★☆
Estimated cost: $4,800-6,200+ (wheels + tires + install)
Performance Comparison Matrix
| Metric | Tier A | Tier B | Tier C | Tier D | Tier E |
|---|---|---|---|---|---|
| Wheel Spec | F 19x8.5J ET47 / R 19x12.0J ET48 | F 19x9.0J ET47 / R 19x12.0J ET47 | F 18x9.0J ET46 / R 18x12.0J ET46 | F 18x9.5J ET41 / R 18x12.0J ET46 | F 18x10.0J ET36 / R 18x12.0J ET46 |
| Economy Impact | Negligible | -2 to -4% | -4 to -6% | -6 to -9% | -8 to -12% |
| Appearance | 7/10 | 8/10 | 8.5/10 | 9/10 | 9.5/10 |
| Comfort | 9.5/10 | 9/10 | 8/10 | 6.5/10 | 4/10 |
| Install Difficulty | ★☆☆☆☆ | ★☆☆☆☆ | ★★☆☆☆ | ★★★☆☆ | ★★★★☆ |
| Cost Range | $1,200-1,500 | $1,950-2,550 | $2,600-3,400 | $3,900-5,000 | $4,800-6,200+ |
| Best For | Daily commuting, family use | Daily / street | Street | Show / occasional track | Show only |
Real-World Reference Cases
The examples below are compiled from typical ANKUSI customer configurations and are labeled as reference cases, not individually verified real-world builds.
Case 1: Daily Driver (Factory-Style)
Profile: Everyday driving, prioritizes comfort and low running cost.
Setup: F 19x8.5J ET47 / R 19x12.0J ET48
Cost: ~$620
Outcome: Minimal visual change, ride and fuel economy essentially unaffected.
Case 2: Balanced Enthusiast (Balanced / Flush Fit)
Profile: Wants a sportier stance without sacrificing daily usability.
Setup: F 18x9.0J ET46 / R 18x12.0J ET46
Cost: ~$3,000
Outcome: Noticeable visual upgrade, fuel economy drop within the expected range.
Case 3: Show Build (Max Aggressive)
Profile: Built primarily for shows or occasional track/show use.
Setup: F 18x10.0J ET36 / R 18x12.0J ET46
Cost: ~$5,500
Outcome: Maximum visual impact; daily comfort and fuel economy are heavily compromised, physical test fit required before production.
Decision Guide
1
What's your primary use? Daily commuting → Tier A/B. Weekend street driving → Tier B/C. Show or occasional track use → Tier D/E.
2
What's your budget? Under $800 → Tier A. $800-3,400 → Tier B/C. $3,400+ → Tier D/E.
3
How much does fuel economy matter? Very important → Tier A. Somewhat important → Tier B/C. Not a priority → Tier D/E.
4
Still unsure? Tier C (Balanced / Flush Fit) is the default choice for most Porsche 911 GT3 RS 4.0 owners.
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: F 19x8.5J ET47 → ~6.6″ F backspacing, R 19x12.0J ET48 → ~8.39″ R backspacing
- Flush: F 18x9.0J ET46 → ~6.81″ F backspacing, R 18x12.0J ET46 → ~8.31″ R backspacing
- Max: F 18x10.0J ET36 → ~6.92″ F backspacing, R 18x12.0J ET46 → ~8.31″ R backspacing
A Note on Clearance
Final clearance depends on the exact tire model, suspension height, brake package, alignment and vehicle tolerances. A physical test fit is recommended before production.
Want to check a different width or offset before you order? Use our Offset & Backspacing Calculator to solve the numbers yourself, or looking for your exact Porsche spec, or want a wheel built to a custom offset for your Porsche 911 GT3 RS 4.0? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Custom Forged Wheels for the Porsche 911 GT3 RS 4.0 (2012)
Everything above is reference data. If you want wheels actually built to it, that is what ANKUSI does: we are a forged wheel factory in Guangzhou, China, IATF 16949 and ISO 9001 certified, forging on our own 10,000-ton press and producing over 120,000 wheels a year. Forging blank, CNC machining, finishing, coating and inspection all happen in the same building — nothing is subcontracted and nothing is relabelled from another manufacturer.
Every set is cut to order and the 71.6mm centre bore are machined for this car specifically rather than shimmed with adaptor rings. Diameter, width, offset, concavity, monoblock or multi-piece construction and the finish are all yours to choose.
We do not hold this pattern wheels on a shelf — they are forged to order, which is why any offset, width and bore combination on this page is buildable rather than limited to a stock list.
Frequently Asked Questions
What is the center bore size on the Porsche 911 GT3 RS 4.0?
The Porsche 911 GT3 RS 4.0's center bore is 71.6mm. If an aftermarket wheel has a larger center bore than this, hub-centric rings are recommended so the wheel centers on the hub itself rather than relying on the lug bolts alone.
What is the biggest wheel size I can fit on my Porsche 911 GT3 RS 4.0 without rubbing?
The most aggressive fitment we recommend without fender work is F 18x10.0J ET36 / R 18x12.0J ET46. Going beyond this typically causes rubbing under compression unless you roll the fenders or add camber correction.
What does a flush wheel fitment look like on the Porsche 911 GT3 RS 4.0?
For a flush look with minimal to no rubbing, we recommend F 18x9.0J ET46 / R 18x12.0J ET46 as a starting point on a stock or mildly lowered Porsche 911 GT3 RS 4.0.
Do I need wheel spacers for my Porsche 911 GT3 RS 4.0?
No. ANKUSI forges each wheel to your exact target offset, including the flush or max specs above, so you get the correct fitment without stacking spacers. Spacers are typically only used to push out an existing OE-offset wheel without replacing it, which isn't necessary when you're ordering a custom-offset forged wheel.
How do I calculate wheel backspacing for my Porsche 911 GT3 RS 4.0?
Backspacing (in inches) = wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance). For example, the flush spec above works out to roughly 6.81" backspacing up front and 8.31" in the rear.
What's the difference between wheel offset and backspacing?
Offset is the distance in millimeters from the wheel's true centerline to its mounting face (positive offset pulls the wheel in, negative pushes it out). Backspacing is the distance in inches from the mounting face to the back edge of the wheel barrel. They describe the same fitment from two different reference points, which is why ANKUSI lists both above — some shops and tuning guides quote offset, others quote backspacing.
Can I run staggered wheels (different sizes front and rear) on my Porsche 911 GT3 RS 4.0?
Yes — the Porsche 911 GT3 RS 4.0's factory and our recommended flush/max fitments already use staggered sizing (different width front and rear), and ANKUSI can forge matching staggered sets to your target offsets.
Hub-Centric Rings for a 71.6 mm Center Bore
A wheel with a center bore larger than 71.6 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 72.6 mm | 72.6 → 71.6 mm |
| 73.1 mm | 73.1 → 71.6 mm |
| 74.1 mm | 74.1 → 71.6 mm |
| 76.1 mm | 76.1 → 71.6 mm |
ANKUSI forged wheels are bored to exactly 71.6 mm for this vehicle, so no ring is needed.
Sources and Last Update
Data checked against: avtoreference.com.
This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).
Other cars on the same factory size: 19x8.5 wheels · 19 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.
Forged Wheel Designs for the Porsche 911 GT3 RS 4.0
Every design below is forged to order, so it can be machined to the Porsche 911 GT3 RS 4.0's bolt pattern and 71.6 mm center bore, with the width and offset calculated for your setup.
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Bolt pattern and center bore on this page come from published fitment references and are still awaiting a second independent check. Last reviewed 2026-09-18. Spotted an error? Email info@ankusi.com and we will verify and correct it.