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2016 Porsche 911 GT3 RS Wheels & Rims: Bolt Pattern, Offset & Sizes

Fitting Porsche 911 GT3 RS wheels? This page gives the 2016 Porsche 911 GT3 RS bolt pattern, centre bore, factory rim size and the offset range for aftermarket and forged Porsche 911 GT3 RS rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.

Porsche 911 GT3 RS (2016): Porsche centerlock hub, 71.6mm center bore. Factory wheels: F: 20x9.5J R: 21x12.5J. Aftermarket flush/max data coming soon.

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)

Year2016

CategoryTrack Sports Car

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

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

On a track-focused car the factory already spent the unsprung-weight budget carefully, so the aftermarket brief is narrow: same footprint, less mass, more barrel clearance for the brake package. Chasing poke on a car like this usually costs lap time before it buys looks.

We publish the factory specification for the Porsche 911 GT3 RS 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 911 GT3 RS OE Wheel Specs

The 2016 Porsche 911 GT3 RS (Track Sports Car) runs a Centerlock hub with a 71.6mm register. Factory wheels are F: 20x9.5J R: 21x12.5J.

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 911 GT3 RS (2016) we machine every wheel to the vehicle’s own hub dimensions 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.

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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: 991 GT3 RS builds run APEX/BBS FI-R/Advan Racing GT centerlock forged, Ohlins/KW motorsport, Michelin Cup 2/Cup 2R, factory PCCB verified on APEX 991 GT3 RS/GT2 RS guide; centerlock-splined forged wheels only (101mm centerlock seat), not bolt-on adapters

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 911 GT3 RS (2016)

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. 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.

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Frequently Asked Questions

Do I need wheel spacers for my Porsche 911 GT3 RS?

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 911 GT3 RS?

The Porsche 911 GT3 RS 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 911 GT3 RS

Every design below is forged to order, so it can be machined to the Porsche 911 GT3 RS's bolt pattern, with the width and offset calculated for your setup.