Fitting Porsche 718 Boxster wheels? This page gives the 2017 Porsche 718 Boxster bolt pattern (5x130), centre bore, factory rim size and the offset range for aftermarket and forged Porsche 718 Boxster rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Porsche 718 Boxster (2017): 5x130 bolt pattern, 71.6mm center bore. Factory wheels: F: 18x8J R: 18x9.5J. Flush and max fitment confirmed on request.
✓ 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 →
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.
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 718 Boxster 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.
The 2017 Porsche 718 Boxster (Sports Convertible) uses a 5x130 bolt pattern with a 71.6mm center bore. Factory wheels are F: 18x8J R: 18x9.5J.
Why the factory spec works for most owners:
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Porsche 718 Boxster (2017) 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.
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 SM-10/EC-7 or BBS LM (19x8.5 ET50 / 19x11 ET50 confirmed no-spacer on a 982 GTS) are common street/track fitments staggered platform, keep the rear wider; verify brake package (steel/PCCB) for barrel clearance
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.
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)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 entries in our database (375 of 6,503); 78.7% of those also use 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.
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: 18x8 wheels · 18 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.
Every design below is forged to order, so it can be machined to the Porsche 718 Boxster's 5x130 bolt pattern and 71.6 mm center bore, with the width and offset calculated for your setup.
Brixton-Style forged wheels featuring the metallic gray / gloss black 10-spoke 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.
Matte Silver 10-Spoke Riveted Deep Lip
Porsche 911 992 / 911 991 Fitment · 5-Lug
Gloss White 10-Spoke · 5-Lug
Bright Silver 5 V-Spoke
Gloss Black Swirl-Blade · 5-Lug
Porsche 911 / M3 Fitment · 5-Lug
BMW M3 E46 / 911 Fitment · 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.