The 992.1 GT3, GT3 Touring and S/T ride on a centerlock hub with a single central nut, 20-inch fronts and 21-inch rears, and factory offsets of ET46 front and ET45 rear. This guide covers the 2022–2024 GT3 and GT3 Touring and the 2024 S/T, with documented aftermarket setups, brake clearance and the 19-inch track option.
About this guide: Fitment data is compiled from customer cars in wheel-maker fitment galleries and owner posts on Rennlist's 992 GT3 forum, cross-checked against vendor fitment documentation. Use it as research for your build; ride height, tires, and alignment are still your installer's call.
Pricing forged wheels for your 992 GT3? Full sets from $3,875 in 19″/20″, or $4,150 in 20″/21″.See your exact price →
OEM Setups
Factory Wheel & Tire Configurations
Every 992.1 GT3, GT3 Touring and S/T shares the hardware below. Porsche approves one 20/21-inch summer size on 255/35ZR20 front and 315/30ZR21 rear tires: forged aluminum on the GT3 and Touring and forged magnesium on the S/T. The GT3 wheel, 9.5J ET46 / 12J ET45, is the reference for every "mm out" figure below.
Part NumbersFront 9GT.601.025.Q · Rear 9GT.601.025.R
Applies ToGT3 and GT3 Touring (2022–2024) · centerlock hub
The standard GT3 and GT3 Touring wheel, forged, on the centerlock hub. Porsche approves it on Michelin Pilot Sport Cup 2 and Cup 2 R, Goodyear Eagle F1 SuperSport R and Pirelli P Zero Corsa tires. Its ET46 front and ET45 rear are the reference for every ladder below. Porsche's certificates list the same sizes and offsets for the 992.2 GT3.
20″/21″ S/T Magnesium Wheel (Centerlock)
Standard — S/T
Front Wheel9.5J×20 ET46
Rear Wheel12J×21 ET44
Front Tire255/35ZR20
Rear Tire315/30ZR21
ConstructionForged Magnesium (one-piece)
Part NumbersFront 9GT.601.025.BE · Rear 9GT.601.025.BF
Applies To911 S/T (2024) · centerlock hub
The S/T's standard wheel: forged magnesium, one piece, with rear-milled spokes, per Porsche. The sizes match the GT3 wheel, but magnesium part listings show an ET44 rear instead of ET45, about 1mm further out; check the stamp on your wheels. The S/T also comes standard with ceramic (PCCB) brakes and has no rear-axle steering.
20″/21″ GT3 Winter Fitment
Winter — GT3 Family
Front Wheel9J×20 ET43
Rear Wheel11.5J×21 ET46
Front Tire245/35R20
Rear Tire305/30R21
ConstructionAluminum Alloy
Part NumbersFront 9GT.601.025.B · Rear 9GT.601.025.C
Porsche's winter fitment for the GT3, a half-inch narrower than the summer wheel at each end, on Michelin Pilot Alpin 5 or Goodyear UltraGrip Performance winter tires. By the lip formula it sits about 3mm inside the summer wheel at the front and 7mm at the rear. Snow chains are approved on the rear axle only.
Aftermarket Options
Aftermarket Wheel & Tire Configurations
Every card below is one wheel size, and every row is one documented GT3 build at its offset. The centerlock hub takes no spacers, so every offset here is built into the wheel. The builds apply to the GT3, GT3 Touring and S/T, which share the same wheel sizes and wheel wells. Every documented build is staggered.
Tap a setup to jump to its full card. Fit: Bolt-on = documented at stock ride height with no fender work reported · Lowered = documented on lowering springs or coilovers · Not reported = owners didn't say. Sources = owner builds (including customer cars in vendor galleries) and vendor fitment-guide setups documented on that card.
The GT3 family uses the narrow Carrera-width body but its own ET46 front and ET45 rear, set by GT3 suspension geometry. Carrera, GTS and GT3 RS builds don't carry over; use GT3 builds like the ones on this page. Porsche's certificates list the same sizes and offsets for the 992.2 GT3.
20-inch fronts with the factory brakes.
The 408mm steel front brakes on the GT3 and Touring and the 410mm ceramic (PCCB) brakes, optional on those cars and standard on the S/T, both need a 20-inch front wheel. 19-inch setups need an aftermarket front brake kit. Tell us which brakes your car has so caliper clearance is checked.
Centerlock only, no spacers.
Every car in this guide uses a single central locking nut torqued to 600 Nm with a calibrated tool. The hub takes no spacers, so every offset has to be built into the wheel. The GT3 and Touring have rear-axle steering as standard and the S/T does not; tell us when you order so the inner barrel is checked. Some 2021–2024 centerlock 911s, including this model, are part of Porsche's center-lock recall (NHTSA 24V809, expanded in 2026 as 26V682). Check your VIN with a dealer before changing wheels.
Staggered Setup
Most Popular
Stanceflush → poke
OEM
Aggressive
RWD onlyDaily
Front Wheels
20×9.5 ET44
Rear Wheels
21×12 ET44
Documented buildLip position vs. stock · F 9.5J ET46 · R 12J ET45
ET44 / ET44
992.1 GT3 (three cars) · customer cars in a vendor gallery: one on 255/35R20 / 315/30R21 Goodyear Eagle F1 SuperSport R, two on 265/35R20 / 325/30R21 Nankang CR-S, one of which reports added camber and a front rub near full lock · a vendor fitment guide lists this size for both factory brake packages · ride height not reported
Front2mm outRear1mm out
Sources
Well-documented
3 community
1 vendor
The most documented GT3 size keeps the factory diameters and widths and moves the face out about 2mm at the front and 1mm at the rear. It runs on factory-size 255 / 315 tires or one size up on 265 / 325; with the wider pair, one owner reports added camber and a front rub near full lock.
Stanceflush → poke
OEM
Aggressive
RWD onlyTrack
Front Wheels
20×9.5 ET44
Rear Wheels
20×12.5 ET48
Documented buildLip position vs. stock · F 9.5J ET46 · R 12J ET45
ET44 / ET48
992.1 GT3 · customer car in a vendor gallery · 255/35R20 / 325/30R20 Michelin Pilot Sport Cup 2 R · ride height not reported
Front2mm outRear3mm out
Sources
Documented
1 community
A 20-inch rear in place of the factory 21, a half-inch wider, so a 325/30R20 rear fits. Owners choose it for track tires: more compounds come in 20-inch sizes than in 21. The face sits about 2mm out at the front and 3mm at the rear. The 20-inch rear sits shorter than the factory 315/30R21, so speedometer readings change slightly.
Stanceflush → poke
OEM
Aggressive
RWD onlyShow
Front Wheels
21×9.5 ET40
Rear Wheels
22×12.5 ET45
Documented buildLip position vs. stock · F 20″ 9.5J ET46 · R 21″ 12J ET45
ET40 / ET45
GT3 Touring (model year not stated) · customer car in a wheel-maker forum post · the builder describes it as an appearance build · tires and ride height not reported
Front6mm outRear6mm out
Sources
Documented
1 community
A plus-one setup: 21-inch fronts and 22-inch rears, with the rear a half-inch wider than stock. The builder calls it an appearance build, not a track setup. Tires weren't reported, but 21/22-inch GT3 builds commonly run 255/30R21 fronts and 335/25R22 rears to stay close to the factory diameter. The face sits about 6mm out at both ends.
Stanceflush → poke
OEM
Aggressive
RWD onlyTrack
Front Wheels
19×10 ET42
Rear Wheels
19×13 ET45
Documented buildLip position vs. stock · F 20″ 9.5J ET46 · R 21″ 12J ET45
ET42 / ET45
Aftermarket front brakes992.1 GT3 (three cars) · customer cars in a vendor gallery, all on aftermarket front brakes (one on a 394mm six-piston kit) · two on 265/35R19 / 325/30R19 Michelin Pilot Sport Cup 2, one on slicks · the rear wiring harness needs routing away from the smaller wheel
Front10mm outRear13mm out
Sources
Well-documented
3 community
1 vendor
A dedicated track setup on 19-inch wheels at both ends. The factory front brakes need a 20-inch wheel, so every documented car runs an aftermarket front brake kit with a smaller caliper, and the rear wiring harness is routed away from the smaller wheel. The face sits about 10mm out at the front and 13mm at the rear; these cars run track alignments.
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Built to the exact spec, not the closest one on a shelf. The setups above come from real 911 GT3 builds, and we CNC-machine every wheel to them directly. If a build needs a spacer to reach its offset, we machine that offset into the wheel instead.
Choose your setup.
This guide is built to give you what you need to pick a spec with confidence: documented 911 GT3 builds, tire sizes, and how each one fits. If you still have questions, we're happy to help before you order.
Engineering verification.
Our manufacturing partner confirms wheel specs, including bolt pattern, center bore, brake caliper clearance, backspacing and load rating.
Render approval.
You approve the design and final specs before we move forward with production.
Our fitment guarantee
Every set is guaranteed to mount on your 911 GT3, GT3 Touring or S/T: made for the factory centerlock hub and its central nut, with no spacers or adapters, and made to the exact width and offset you approved.
How a setup sits on your car also depends on ride height, tires and alignment, so choose with your plans in mind.
Do the 992.1 GT3, GT3 Touring and S/T use the same wheels?
They share the 20/21-inch sizes and centerlock hub: 9.5J×20 ET46 front on 255/35ZR20 and 12J×21 ET45 rear on 315/30ZR21. The GT3 and Touring come on forged aluminum wheels; the S/T comes on forged magnesium, whose part listings show an ET44 rear. Every build on this page applies to all three, so check the stamp on your rear wheel.
What hardware does the 992.1 GT3 use?
Every 992.1 GT3, GT3 Touring and S/T uses a centerlock hub, a single central locking nut in place of lug bolts, so there's no bolt pattern or lug seat to match. Porsche specifies 600 Nm (443 lb-ft), applied with a calibrated centerlock tool, never an impact wrench. An FMB set for this car is made for the centerlock hub.
What aftermarket wheel sizes are documented on the 992.1 GT3?
The most documented size is 20×9.5 ET44 front and 21×12 ET44 rear, on three customer cars and in a vendor fitment guide; it sits about 2mm out at the front and 1mm at the rear. A 20×12.5 ET48 rear on 325/30R20 tires, a 21/22-inch appearance build and 19-inch track sets are also documented. Ride height wasn't reported on these builds.
How do I read the offset ladder on each card, and what's the difference between flush and aggressive?
Each card is one wheel size and each row is one documented build at its effective offset. The Front and Rear figures show how far the outer lip sits outside the factory 9.5J ET46 / 12J ET45 wheel. On the GT3, up to about 3mm reads as flush and 6mm as a mild step; the 19-inch track sets, at 10mm front and 13mm rear, are the aggressive end.
Can I run 19-inch wheels on the 992.1 GT3?
Not with the factory front brakes. The standard 408mm steel brakes and the 410mm ceramic (PCCB) brakes, optional on the GT3 and Touring and standard on the S/T, both need a 20-inch front wheel. Every documented 19-inch GT3 runs an aftermarket front brake kit with a smaller caliper, and the rear wiring harness needs routing away from the wheel.
Why is there no square setup on the GT3?
Every factory GT3 package is staggered, and every aftermarket build we documented is staggered too, so there are no square builds to show. The closest is the 19-inch track set, 19×10 front and 19×13 rear. The GT3 is rear-wheel drive, so front-to-rear rolling diameter doesn't stress a center differential, but changing it does change how the car balances on track.
Can I use wheel spacers on the 992.1 GT3?
No. The centerlock hub has no provision for spacers, so every offset on a GT3 has to be built into the wheel itself. That's why every row on this page is a wheel built at its listed offset. FMB machines the offset you choose directly into the wheel, so there's no spacer and no change to the factory centerlock nut.
What are the factory winter wheel options for the 992.1 GT3?
Porsche approves one winter fitment for the GT3 and GT3 Touring: 9J×20 ET43 front and 11.5J×21 ET46 rear on 245/35R20 and 305/30R21 winter tires, such as the Michelin Pilot Alpin 5. By the lip formula it sits about 3mm inside the summer wheel at the front and 7mm at the rear. Snow chains are approved on the rear axle only.
Which model years does this guide cover, and does it apply to the 992.2 GT3?
Model years 2022–2024 for the GT3 and GT3 Touring, and 2024 for the S/T. The 10th VIN character reads N, P or R on these cars. Porsche's certificates list the same 20/21-inch sizes and ET46 / ET45 offsets for the 992.2 GT3, so these builds describe the same wheel position, but check your car's door-jamb and wheel stamps before ordering.
Do GT3 RS or Carrera wheels fit the 992.1 GT3?
Not as a matched setup. The GT3 RS uses a wider body with 10J×20 ET45 front and 13J×21 ET31 rear wheels; on a GT3 that rear sits about 27mm outside the factory wheel. Carrera wheels are mostly 5-lug and sit well inside the GT3's offsets. See our 992.1 GT3 RS guide and 992.1 Carrera guide.
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