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2021 Porsche Boxster 25 Years Edition Wheels & Rims: Bolt Pattern, Offset & Sizes

Fitting Porsche Boxster 25 Years Edition wheels? This page gives the 2021 Porsche Boxster 25 Years Edition bolt pattern (5x130), centre bore, factory rim size and the offset range for aftermarket and forged Porsche Boxster 25 Years Edition rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.

Porsche Boxster 25 Years Edition (2021): 5x130 bolt pattern, 71.6mm center bore. Factory wheels: F: 20x8.5J R: 20x10.5J. Aftermarket flush/max data coming soon.

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)

Year2021

CategorySports Convertible

✓ Verified by ANKUSI's Engineering Team — IATF 16949 & ISO 9001 certified forged wheel manufacturer, TÜV/SFI/VIA compliant. See our factory & certifications →

Forged wheels for the Porsche Boxster 25 Years EditionMachined to the 5x130 bolt pattern and 71.6 mm bore · 14–24 inch · offset calculated for your car · 3D drawing before production

BBS RS-Style Gold / Silver Deep Lip Forged Wheels – BMW M3 E46 / Porsche 911 Fitment (5-Lug)

Porsche 911 / BMW M3 Forged Wheels – Gloss Black 5 Split-Spoke (5-Lug)

Porsche OEM-Style Gloss Black Mesh Blue-Ring Beadlock Forged Wheels – Porsche 911 / Panamera Fitment (5-Lug)

Porsche OEM-Style Rueich Bright Silver 5 Y-Spoke Forged Wheels – Porsche 911 992 / 911 991 Fitment (5-Lug)

See wheel designs

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.

Diagram showing wheel measurement points: centerline, center bore diameter, PCD, offset, rim width and diameter — Centerline, center bore, PCD, offset, width & diameter

Diagram comparing positive, zero, and negative wheel offset relative to the wheel centerline — Positive vs. zero vs. negative offset

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.

We publish the factory specification for the Porsche Boxster 25 Years Edition below. We have not yet been able to verify aftermarket flush or maximum-aggressive offsets for this exact variant against a source we trust, so we are not listing any - an invented offset is worse than no offset when a wheel has to clear a caliper.

Porsche Boxster 25 Years Edition OE Wheel Specs

The 2021 Porsche Boxster 25 Years Edition (Sports Convertible) uses a 5x130 bolt pattern with a 71.6mm center bore. Factory wheels are F: 20x8.5J R: 20x10.5J.

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 25 Years Edition (2021) 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.

IATF 16949 & ISO 9001 certified · own 10,000-ton press in Guangzhou · from a single set to a full container

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.

Get a quote for this car WhatsApp the factory

Aftermarket Fitment Data — Coming Soon

Published aftermarket fitment for this exact variant is still thin, so we have not committed to a flush or maximum-aggressive figure. Our engineering team is still collecting verified data for this variant. In the meantime the factory specification above is accurate and is the safe reference point for ordering.

What we do know: APEX offers 19in and 20in for the 718; forged 3-piece popular (ThreePiece.us) Boxster 25 Years is a 718 Boxster (982), shares 5x130 CB71.6 and 718 fitment window with the Cayman. Verified on 718/982 platform (718 Forum / ThreePiece / APEX)

Need a wheel for this car now? Contact ANKUSI with your target diameter, width and offset and our engineers will confirm the correct forged spec against your brake package before anything is cut. You can also use our Offset & Backspacing Calculator to work through the numbers yourself.

Custom Forged Wheels for the Porsche Boxster 25 Years Edition (2021)

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)

Request a quote WhatsApp the factory Wholesale & OEM

Frequently Asked Questions

What bolt pattern (PCD) does the Porsche Boxster 25 Years Edition use?

The 2021 Porsche Boxster 25 Years Edition uses a 5x130 bolt pattern.

How many lug bolts does the Porsche Boxster 25 Years Edition use?

The Porsche Boxster 25 Years Edition 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 25 Years Edition?

The Porsche Boxster 25 Years Edition'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 25 Years Edition?

Factory wheels on the Porsche Boxster 25 Years Edition are F: 20x8.5J R: 20x10.5J.

Do I need wheel spacers for my Porsche Boxster 25 Years Edition?

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.

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 25 Years Edition?

The Porsche Boxster 25 Years Edition runs the same wheel size front and rear from the factory, so staggered fitment is not required. ANKUSI can still forge a staggered set (wider rear) on request if you want a more aggressive stance.

Forged Wheel Designs for the Porsche Boxster 25 Years Edition

Every design below is forged to order, so it can be machined to the Porsche Boxster 25 Years Edition's 5x130 bolt pattern and 71.6 mm center bore, with the width and offset calculated for your setup.