Porsche 911 / BMW M3 Forged Wheels
Brushed Silver 6-Spoke · 5-Lug
2001 Porsche Boxster S Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Porsche Boxster S wheels? This page gives the 2001 Porsche Boxster S bolt pattern (5x130), centre bore, factory rim size and the offset range for aftermarket and forged Porsche Boxster S rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Porsche Boxster S (2001): 5x130 bolt pattern, 71.6mm center bore. Factory wheels: F: 17x7J R: 17x8.5J. 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 4-piston caliper, all four corners (OEM, Porsche)
Year2001
CategorySports Convertible
✓ Verified by ANKUSI's Engineering Team — 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: 17x7J R: 17x8.5J |
| Flush Fitment | F 18x8J ET57 / R 18x10J ET58 |
| Maximum Aggressive | F 18x8J ET50 / R 18x10J ET47 |
Forged wheels for the Porsche Boxster SMachined 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
A convertible carries its extra structural weight low and behind the axle line, so wheel mass and offset changes show up in ride and steering feel faster than they do on the coupe. A forged wheel keeps the rotating mass down while you add the width the arches will take.
The Porsche Boxster S runs a 5x130 fitment, 71.6mm center bore, and a F: 17x7J wheel from the factory. Our Flush Fitment reference is F 18x8J ET57 / R 18x10J ET58, which tucks the tire under the fender lip on a stock-height Porsche Boxster S. Our Maximum Aggressive reference is F 18x8J ET50 / R 18x10J ET47 - beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Porsche Boxster S OE Wheel Specs
Correction (19 Sep 2026): the flush and maximum-aggressive reference sizes were listed in the wrong order (the "maximum" set sat further inboard than the "flush" set). They are now ordered by outward offset: flush F 18x8J ET57 / R 18x10J ET58, maximum F 18x8J ET50 / R 18x10J ET47.
The 2001 Porsche Boxster S (Sports Convertible) uses a 5x130 bolt pattern with a 71.6mm center bore. Factory wheels are F: 17x7J R: 17x8.5J.
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 Boxster S (2001) 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 — 6,436 vehicles, free to download, CC BY 4.0.
Flush Fitment
For a flush look with minimal rubbing, F 18x8J ET57 / R 18x10J ET58 is the recommended starting point on a stock or mildly lowered Porsche Boxster S.
Maximum Aggressive Fitment
F 18x8J ET50 / R 18x10J ET47 is a more aggressive reference setup. Beyond this, expect rubbing under compression without fender rolling or camber correction.
Real-World Fitment Notes
986 Boxster S community runs 18x8 ET50 front + 18x10 ET47 rear on Carrera-style wheels mid-engine 986 tolerates a square 18x8 ET50 all-around for track use
5-Tier Configuration Options
A Factory-Style F 17x7.0J ET50 / R 17x8.5J ET47
Recommended setup: F 17x7.0J ET50 / R 17x8.5J ET47 | 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 18x8.0J ET50 / R 18x10.0J ET47
Recommended setup: F 18x8.0J ET50 / R 18x10.0J 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 18x8.0J ET50 / R 18x10.0J ET47
Recommended setup: F 18x8.0J ET50 / R 18x10.0J ET47 | 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 18x8.0J ET54 / R 18x10.0J ET53
Recommended setup: F 18x8.0J ET54 / R 18x10.0J ET53 | 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 18x8.0J ET57 / R 18x10.0J ET58
Recommended setup: F 18x8.0J ET57 / R 18x10.0J ET58 | 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 17x7.0J ET50 / R 17x8.5J ET47 | F 18x8.0J ET50 / R 18x10.0J ET47 | F 18x8.0J ET50 / R 18x10.0J ET47 | F 18x8.0J ET54 / R 18x10.0J ET53 | F 18x8.0J ET57 / R 18x10.0J ET58 |
| 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 17x7.0J ET50 / R 17x8.5J ET47
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 18x8.0J ET50 / R 18x10.0J ET47
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 18x8.0J ET57 / R 18x10.0J ET58
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 Boxster S owners.
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: F 17x7J ET50 → ~5.97″ F backspacing, R 17x8.5J ET47 → ~6.6″ R backspacing
- Flush: F 18x8J ET50 → ~6.47″ F backspacing, R 18x10J ET47 → ~7.35″ R backspacing
- Max: F 18x8J ET57 → ~6.74″ F backspacing, R 18x10J ET58 → ~7.78″ 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 Boxster S? 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 Boxster S (2001)
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:
Porsche 911 / BMW M3 Forged Wheels – Gloss White 5-Spoke
HRE 522M-Style Polished Silver 5-Spoke Directional Forged Wheels – Porsche Cayenne / Porsche 911 Fitment (5-Lug)
Porsche OEM-Style Brushed Silver 5 Split-Spoke Forged Wheels – Porsche 911 992 / 911 991 Fitment (5-Lug)
Porsche 911 / BMW M3 Forged Wheels – Gloss White 10-Spoke (5-Lug)Frequently Asked Questions
What bolt pattern (PCD) does the Porsche Boxster S use?
The 2001 Porsche Boxster S uses a 5x130 bolt pattern.
How many lug bolts does the Porsche Boxster S use?
The Porsche Boxster S 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 Boxster S?
The Porsche Boxster S'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 Boxster S?
Factory wheels on the Porsche Boxster S are F: 17x7J R: 17x8.5J.
What is the biggest wheel size I can fit on my Porsche Boxster S without rubbing?
The most aggressive fitment we recommend without fender work is F 18x8J ET50 / R 18x10J ET47. 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 Boxster S?
For a flush look with minimal to no rubbing, we recommend F 18x8J ET57 / R 18x10J ET58 as a starting point on a stock or mildly lowered Porsche Boxster S.
Do I need wheel spacers for my Porsche Boxster S?
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 Boxster S?
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 6.74" backspacing up front and 7.78" 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 Boxster S?
Yes — the Porsche Boxster S'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.
Forged Wheel Designs for the Porsche Boxster S
Every design below is forged to order, so it can be machined to the Porsche Boxster S's 5x130 bolt pattern and 71.6 mm center bore, with the width and offset calculated for your setup.
Porsche 911 / M3 Forged Wheels
Gloss Black / Polished Classic 5-Spoke · 5-Lug
Porsche OEM-Style Gloss Black Machined Multi-Spoke Forged Wheels
Porsche 911 / Panamera Fitment · 5-Lug
Porsche OEM-Style Gloss White Classic 5-Spoke Deep Lip Forged Wheels
Porsche 911 / Panamera Fitment · 5-Lug
Anrky-Style Silver Mesh Forged Wheels
Porsche 911 / M3 Fitment · 5-Lug
Porsche 911 / BMW M3 Forged Wheels
Gunmetal Round-Hole Full-Face
Porsche 911 / BMW M3 Forged Wheels
Gunmetal 5 Split-Spoke · 5-Lug
Porsche OEM-Style Bright Silver 5 Y-Spoke Concave Forged Wheels
Porsche 911 / Panamera Fitment · 5-Lug