BBS-Style Gunmetal 5 Y-Spoke Forged Wheels
Porsche 911 / M3 Fitment · 5-Lug
1975 Porsche 911 Turbo 3.0 Coupe Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Porsche 911 Turbo 3.0 Coupe wheels? This page gives the 1975 Porsche 911 Turbo 3.0 Coupe bolt pattern (5x130), centre bore, factory rim size and the offset range for aftermarket and forged Porsche 911 Turbo 3.0 Coupe rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 1975 Porsche 911 Turbo 3.0 Coupe uses a 5x130 bolt pattern with a 71.6 mm centre bore and M14x1.5 lug bolts. Factory wheels: F: 15x7J R: 15x8J. For aftermarket wheels, 16x7J ET23 front / 16x8J ET15 rear sits flush and 16x9J ET15 front / 17x9J ET29 rear is the most aggressive fit.
Forged wheels for the 1975 Porsche 911 Turbo 3.0 Coupe — drilled 5x130 with a 71.6 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in about 25 days.
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Porsche 911 Turbo 3.0 Coupe (1975): 5x130 bolt pattern, 71.6mm center bore. Factory wheels: F: 15x7J R: 15x8J. Reference fitment ranges.
Bolt Pattern5x130
Wheel Bolt/NutM14x1.5 Bolt
Center Bore71.6mm
Wheel Load Rating700–850 kg/wheel (Performance / Sports Car segment reference)
Caliper TypeFixed 6-piston front caliper (OEM, Porsche Turbo)
Year1975
CategorySupercar
✓ Data check: the bolt pattern and center bore on this page match an independent fitment reference. Last reviewed September 18, 2026. 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 |
|---|---|
| Factory (OE) | F: 15x7J R: 15x8J |
| Flush Fitment | F 16x7J ET23 / R 16x8J ET15 |
| Maximum Aggressive | F 16x9J ET15 / R 17x9J ET29 |
Forged wheels for the Porsche 911 Turbo 3.0 CoupeMachined to the 5x130 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
Every gram of rotational mass on a supercar fights the acceleration, braking, and rotational inertia numbers the factory spent enormous engineering effort achieving. A forged wheel for the Porsche 911 Turbo 3.0 Coupe holds the OE strength rating at meaningfully less weight, which is a real, measurable performance gain rather than a cosmetic one.
The Porsche 911 Turbo 3.0 Coupe runs a 5x130 bolt pattern, 71.6mm center bore, and a F: 15x7J wheel from the factory. Our Flush Fitment reference is F 16x7J ET23 / R 16x8J ET15, which tucks the tire under the fender lip on a stock-height Porsche 911 Turbo 3.0 Coupe. Our Maximum Aggressive reference is F 16x9J ET15 / R 17x9J ET29 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Porsche 911 Turbo 3.0 Coupe OE Wheel Specs
The 1975 Porsche 911 Turbo 3.0 Coupe (Supercar) uses a 5x130 bolt pattern with a 71.6mm center bore. Factory wheels are F: 15x7J R: 15x8J.
Why the factory spec works for most owners:
- Balances ride comfort with everyday drivability
- A commonly used size for this vehicle class, supporting parts and tire availability
- Maintains clearance for the factory suspension and brake components
- Provides stable, predictable handling across normal driving conditions
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Porsche 911 Turbo 3.0 Coupe (1975) we drill the 5x130 pattern and 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 with minimal rubbing, F 16x7J ET23 / R 16x8J ET15 is the recommended starting point on a stock or mildly lowered Porsche 911 Turbo 3.0 Coupe.
Maximum Aggressive Fitment
F 16x9J ET15 / R 17x9J ET29 is a more aggressive reference setup. Beyond this, expect rubbing under compression without fender rolling or camber correction.
Real-World Fitment Notes
930 builds run staggered Fuchs (16x7/16x8) or Fikse Fuchs-style 17x9/17x11, deep-dish RSR-style setups popular 5x130 / 71.6 CB; widebody flares allow wide rears, measure flare clearance (6SpeedOnline/Rennlist) F 15x7J ET23.3 / R 15x8J ET15 Fuchs (5x130, 71.6 CB)
5-Tier Configuration Options
A Factory-Style F 15x7.0J ET23 / R 15x8.0J ET10
Recommended setup: F 15x7.0J ET23 / R 15x8.0J ET10 | 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 16x7.0J ET23 / R 16x8.0J ET13
Recommended setup: F 16x7.0J ET23 / R 16x8.0J ET13 | 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 16x7.0J ET23 / R 16x8.0J ET15
Recommended setup: F 16x7.0J ET23 / R 16x8.0J ET15 | 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 16x8.0J ET19 / R 17x8.5J ET22
Recommended setup: F 16x8.0J ET19 / R 17x8.5J ET22 | 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 16x9.0J ET15 / R 17x9.0J ET29
Recommended setup: F 16x9.0J ET15 / R 17x9.0J ET29 | 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 15x7.0J ET23 / R 15x8.0J ET10 | F 16x7.0J ET23 / R 16x8.0J ET13 | F 16x7.0J ET23 / R 16x8.0J ET15 | F 16x8.0J ET19 / R 17x8.5J ET22 | F 16x9.0J ET15 / R 17x9.0J ET29 |
| 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 15x7.0J ET23 / R 15x8.0J ET10
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 16x7.0J ET23 / R 16x8.0J ET15
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 16x9.0J ET15 / R 17x9.0J ET29
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 Turbo 3.0 Coupe owners.
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: F 15x7J ET23 → ~4.91″ F backspacing, R 15x8J ET10 → ~4.89″ R backspacing
- Flush: F 16x7J ET23 → ~4.91″ F backspacing, R 16x8J ET15 → ~5.09″ R backspacing
- Max: F 16x9J ET15 → ~5.59″ F backspacing, R 17x9J ET29 → ~6.14″ 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 Turbo 3.0 Coupe? 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 Turbo 3.0 Coupe (1975)
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, so the 5x130 pattern 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.
Designs we already tool for the 5x130 pattern — each one is re-cut to your sizes and offsets:
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HRE 522M-Style Polished Silver 5-Spoke Directional Forged Wheels - Porsche Cayenne / Porsche 911 Fitment (5-Lug)
Porsche 911 / BMW M3 Forged Wheels – Mirror Polished 5-Spoke Deep-Lip (5-Lug)
HRE-Style Bronze 5 Y-Spoke Forged Wheels – Porsche 911 / M3 Fitment (5-Lug)Frequently Asked Questions
What bolt pattern (PCD) does the Porsche 911 Turbo 3.0 Coupe use?
The 1975 Porsche 911 Turbo 3.0 Coupe uses a 5x130 bolt pattern.
How many lug bolts does the Porsche 911 Turbo 3.0 Coupe use?
The Porsche 911 Turbo 3.0 Coupe uses a 5-lug bolt pattern (5x130), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Porsche 911 Turbo 3.0 Coupe?
The Porsche 911 Turbo 3.0 Coupe'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 size are the factory (stock) wheels on the Porsche 911 Turbo 3.0 Coupe?
Factory wheels on the Porsche 911 Turbo 3.0 Coupe are F: 15x7J R: 15x8J.
What is the biggest wheel size I can fit on my Porsche 911 Turbo 3.0 Coupe without rubbing?
The most aggressive fitment we recommend without fender work is F 16x9J ET15 / R 17x9J ET29. 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 Turbo 3.0 Coupe?
For a flush look with minimal to no rubbing, we recommend F 16x7J ET23 / R 16x8J ET15 as a starting point on a stock or mildly lowered Porsche 911 Turbo 3.0 Coupe.
Do I need wheel spacers for my Porsche 911 Turbo 3.0 Coupe?
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 Turbo 3.0 Coupe?
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 4.91" backspacing up front and 5.09" 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 Turbo 3.0 Coupe?
Yes — the Porsche 911 Turbo 3.0 Coupe'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.
Vehicles With the Same Hub as the Porsche 911 Turbo 3.0 Coupe (5x130, 71.6 mm Bore)
In our database, 294 other vehicle entries from 10 makes use exactly the same 5x130 bolt pattern and 71.6 mm center bore. Factory wheels from these cars bolt on and center on the hub without rings; offset and width still have to be checked.
5x130 is used by 5.8% of the vehicle pages in our English fitment guide (375 of 6,503); 78.7% of those also use a 71.6 mm center bore.
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: 15x7 wheels · 15 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 Turbo 3.0 Coupe
Every design below is forged to order, so it can be machined to the Porsche 911 Turbo 3.0 Coupe's 5x130 bolt pattern and 71.6 mm center bore, with the width and offset calculated for your setup.
Porsche 911 / M3 Forged Wheels
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HRE Performance 501-Style Matte Silver Deep Lip Cut-Out Riveted Forged Wheels - Porsche 911 / BMW M3 G80 Fitment (5-Lug)
HRE-Style forged wheels featuring the matte silver deep lip cut-out riveted design, forged to order at ANKUSI's Guangzhou plant. Bolt pattern, centre bore, diameter, width and offset are machined for your exact vehicle — this listing covers 5-lug applications.
Porsche 911 / BMW M3 Forged Wheels
Brushed Silver Twisted 12-Spoke · 5-Lug
Bolt pattern and center bore on this page were cross-checked against at least two independent sources before publication. Last reviewed 2026-09-18. Spotted an error? Email info@ankusi.com and we will verify and correct it.