Porsche 911 Turbo / Turbo S 991 (2014–2019) Wheel Fitment Guide
The 991 Turbo and Turbo S run 20-inch wheels on the widest 991 body: 5×130 hubs with a 71.6mm bore and M14×1.5 ball-seat bolts on the Turbo, centerlocks on the Turbo S. Factory offsets are ET51 front and ET56 rear. This guide covers 2014–2019 cars, both hubs, ceramic brake clearance and documented setups.
About this guide: Fitment data is compiled from owner builds on Rennlist and customer cars in wheel-maker fitment galleries, cross-checked against vendor fitment documentation and Porsche's approved wheel certificates. Use it as research for your build; ride height, tires, and alignment are your installer's call.
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OEM Setups
Factory Wheel & Tire Configurations
Every 991 Turbo and Turbo S runs 245/35ZR20 front and 305/30ZR20 rear tires. The 991.2 Turbo and every Turbo S use 9J ET51 / 11.5J ET56 wheels, the reference for every "mm out" figure below; the 991.1 Turbo's 8.5J / 11J wheels sit about 6mm further in at each end.
Porsche 911 Turbo / Turbo S 991 Hub & Hardware Specs
Turbo & Turbo S — 2014–2019
Bolt Pattern5×130 (Turbo) · Centerlock (Turbo S standard, Turbo option)
Center Bore71.6mm (5-lug) · Centerlock hub
Fastener TypeLug Bolts (5-lug) · Central Locking Nut (centerlock)
Thread PitchM14×1.5 (5-lug) · Porsche centerlock nut
Seat TypeBall (spherical) seat (5-lug) · No lug seat (centerlock)
Torque Spec118 lb-ft / 160 Nm (5-lug) · 443 lb-ft / 600 Nm (centerlock)
Factory Offset9J ET51 / 11.5J ET56 (991.2 Turbo, all Turbo S) · 8.5J ET51 / 11J ET56 (991.1 Turbo)
Brake SystemTurbo: 380mm front / 380mm rear steel · Turbo S: 410mm / 390mm ceramic (PCCB) standard, optional on Turbo
20″ 911 Turbo Wheel (991.2)
Standard — 991.2 Turbo
Front Wheel9J×20 ET51
Rear Wheel11.5J×20 ET56
Front Tire245/35ZR20
Rear Tire305/30ZR20
ConstructionForged Aluminum
Applies To911 Turbo Coupe & Cabriolet (2017–2019) · 5-lug
The 991.2 Turbo's standard 5-lug wheel, a half-inch wider at each end than the 991.1 Turbo wheel and the same size as the Turbo S wheel. It's the reference for every "mm out" figure on this page. Porsche's 991.2 certificate also approves the narrower 8.5J / 11J sizes on cars without centerlocks.
20″ 911 Turbo S Wheel (991.2)
Standard — 991.2 Turbo S
Front Wheel9J×20 ET51
Rear Wheel11.5J×20 ET56
Front Tire245/35ZR20
Rear Tire305/30ZR20
ConstructionForged Aluminum
Part NumbersFront 991.362.721.00 · Rear 991.362.771.00
Applies To911 Turbo S Coupe & Cabriolet (2017–2019) · centerlock
The 991.2 Turbo S's seven-spoke centerlock wheel, in the same size as the 991.2 Turbo wheel. Porsche's 2017 US spec sheet lists an ET52 rear for the Turbo S Cabriolet, about 4mm further out, while the certificate lists ET56, so check the rear stamp on a Cabriolet's wheels.
20″ 911 Turbo S Wheel (991.1)
Standard — 991.1 Turbo S
Front Wheel9J×20 ET51
Rear Wheel11.5J×20 ET56
Front Tire245/35ZR20
Rear Tire305/30ZR20
ConstructionForged Aluminum
Part NumbersFront 991.362.162.34 · Rear 991.362.167.34
Applies To911 Turbo S Coupe & Cabriolet (2014–2016) · centerlock
The 991.1 Turbo S's ten-spoke centerlock wheel, in the same 9J ET51 / 11.5J ET56 size as every later Turbo S wheel, so the figures on this page read the same on a 991.1 Turbo S. The centerlock nut torques to 600 Nm, and Porsche's certificates list no spacers.
20″ 911 Turbo III Wheel (991.1)
Standard — 991.1 Turbo
Front Wheel8.5J×20 ET51
Rear Wheel11J×20 ET56
Front Tire245/35ZR20
Rear Tire305/30ZR20
ConstructionForged Aluminum
Part NumbersFront 991.362.161.06 · Rear 991.362.166.09
Applies To911 Turbo Coupe & Cabriolet (2014–2016) · 5-lug · also approved on 991.2 Turbo
The 991.1 Turbo's standard 5-lug wheel, a half-inch narrower at each end than the Turbo S wheel. Against the reference it sits about 6mm further in at the front and the rear, so a 991.1 Turbo owner should add 6mm to each figure below to compare with their own stock wheels.
20″ Optional Wheels (9J / 11.5J) — Sport Classic, CFRP
Optional — Turbo & Turbo S
Front Wheel9J×20 ET51
Rear Wheel11.5J×20 ET56
Front Tire245/35ZR20
Rear Tire305/30ZR20
ConstructionForged Aluminum
Part NumbersSport Classic .162.41 / .167.42 · CFRP .723.01 / .773.01 (991.362.)
Applies To911 Turbo & Turbo S (2014–2019) · Sport Classic 5-lug
The 5-lug Sport Classic wheel and the carbon-fiber wheel offered with the 991.2 Turbo S Exclusive Series share the Turbo S wheel's 9J ET51 / 11.5J ET56 sizes, so they sit at the reference position. Check every stamp on a used set, since Carrera versions of some designs use other offsets.
20″ Porsche Winter Wheels
Winter — Turbo & Turbo S
Front Wheel8.5J×20 ET51
Rear Wheel11J×20 ET56 (5-lug) or ET59 (centerlock)
Front Tire245/35R20
Rear Tire295/30R20
ConstructionForged Aluminum
Applies To911 Turbo & Turbo S (2014–2019)
Porsche's winter sets use 8.5J / 11J wheels on 245/35R20 / 295/30R20 tires: ET56 rears on 5-lug cars and an ET59 Turbo Sport II centerlock rear on centerlock cars. Rear snow chains are listed for the 295/30R20 tire. A 991.1 Turbo-only ET52 winter rear isn't approved with PCCB.
Aftermarket Options
Aftermarket Wheel & Tire Configurations
Every card below is one wheel size, and every row is one documented build at its effective offset. 991.1 and 991.2 Turbo and Turbo S cars share the body and the Turbo S wheel size, so builds from either phase and either hub apply to all of them. Every documented build is staggered.
| Setup | Tires (front · rear) | Stance | Fit | Drivetrain | Sources |
|---|---|---|---|---|---|
| Staggered — wider rear | |||||
| 20×9 / 20×12 ★ET41–52 / ET44–50 | Varies by build | ●●●●● | Bolt-on · Lowered · Not reported | AWD only | 9 |
| 20×9 / 20×11ET45 / ET40 | 245/35R20 · 305/30R20 | ●●●●● | Lowered | AWD only | 1 |
| 20×9 / 21×12ET45 / ET50 | 245/35R20 · 325/25R21 | ●●●●● | Not reported | AWD only | 1 |
| 21×9 / 21×12ET40–45 / ET45–50 | Varies by build | ●●●●● | Not reported | AWD only | 2 |
| 21×9.5 / 21×12ET45 / ET48 | 255/30R21 · 325/25R21 | ●●●●● | Not reported | AWD only | 1 |
| 20×9 / 20×11.5ET44 / ET39 | 245/35R20 · 305/30R20 | ●●●●● | Not reported | AWD only | 1 |
| 20×9.5 / 21×12.5ET50 / ET48 | 255/35R20 · 325/25R21 | ●●●●● | Not reported | AWD only | 1 |
| 20×9.5 / 20×12.5ET46 / ET48 | 265/35R20 · 325/30R20 | ●●●●● | Lowered | AWD only | 1 |
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.
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Platform-specific fitment notes — Porsche 911 Turbo / Turbo S 991
Ceramic brakes and wheel size.
Every Turbo S has ceramic brakes (PCCB) with 410mm front rotors, optional on the Turbo, and a vendor lists 20-inch wheels as required to clear them. The steel brakes on the Turbo use 380mm rotors. Every documented setup on this page is 20 or 21 inches.
All-wheel-drive rolling diameter.
Staggered setups can change the front-to-rear rolling diameter ratio, which may stress the all-wheel-drive system over time. Check the math against your owner's manual before ordering; we document tire sizes on every card, and verifying compatibility is your responsibility. Larger 21-inch rear tires are where this matters most.
Centerlock, 5-lug and lug bolts.
Every Turbo S came on centerlock hubs; the Turbo came on 5-lug hubs, with centerlocks optional on some cars. The wheels don't interchange, so order for your hub. FMB machines 5-lug 991 Turbo wheels for 60° conical-seat bolts by default, so a new set runs conical bolts of the correct length. If you want to keep your factory ball-seat bolts, tell us when you order; otherwise the wheels are machined for conical. Most Porsche owners ask for ball seat.
Staggered Setup
Most Popular
Stance range
flush → poke
OEM
Aggressive
Front Wheels
20×9
Documented ET41 – ET52
Rear Wheels
20×12
Documented ET44 – ET50
Documented offsets
Lip position vs. stock · F 9J ET51 · R 11.5J ET56
ET52 / ET47
Front1mm inRear15mm out
ET52 / ET44
Front1mm inRear18mm out
ET47 / ET47
Front4mm outRear15mm out
ET45 / ET50
Front6mm outRear12mm out
ET44 / ET50
Front7mm outRear12mm out
ET44 / ET47
Front7mm outRear15mm out
ET41 / ET47
Front10mm outRear15mm out
Sources
Well-documented
8 community
1 vendor
The most documented 991 Turbo size: the factory 9-inch front with a 12-inch rear, a half-inch wider than stock, on factory or slightly wider tires. Front offsets run ET41–52 and rears ET44–50, with the rear 12–18mm out. If your car is at stock height, start from the ET47 / ET47 row, which three cars run with no changes listed.
Stance
flush → poke
OEM
Aggressive
Front Wheels
20×9 ET45
Rear Wheels
20×11 ET40
Documented build
Lip position vs. stock · F 9J ET51 · R 11.5J ET56
ET45 / ET40
Front6mm outRear10mm out
Sources
Documented
1 community
The mildest documented setup: a factory-width 9-inch front with an 11-inch rear, about 6mm out front and 10mm at the rear of the factory Turbo S wheel. One lowered 5-lug Turbo runs it on the factory tire sizes, reaching its rear offset with a 15mm spacer that FMB would machine into the wheel instead.
Stance
flush → poke
OEM
Aggressive
Front Wheels
20×9 ET45
Rear Wheels
21×12 ET50
Documented build
Lip position vs. stock · F 20″ 9J ET51 · R 20″ 11.5J ET56
ET45 / ET50
Front6mm outRear12mm out
Sources
Documented
1 community
A 21-inch rear on the factory 20-inch front: one 991.1 Turbo runs a 12-inch ET50 rear, about 12mm out of the factory Turbo S wheel. Its 325/25R21 rear tire keeps the rear rolling diameter within about 1% of the factory 305/30R20, which matters on the all-wheel-drive Turbo.
Stance range
flush → poke
OEM
Aggressive
Front Wheels
21×9
Documented ET40 – ET45
Rear Wheels
21×12
Documented ET45 – ET50
Documented offsets
Lip position vs. stock · F 20″ 9J ET51 · R 20″ 11.5J ET56
ET45 / ET50
Front6mm outRear12mm out
ET40 / ET45
Front11mm outRear17mm out
Sources
Documented
2 community
A 21-inch set at both ends, the factory widths moved up an inch in diameter, 6–11mm out front and 12–17mm at the rear. Two owners run it at ET45 / ET50 and ET40 / ET45. Check the front and rear tire diameters against your owner's manual before ordering: one build's tires put the rear about 3.5% taller relative to the front than stock.
Stance
flush → poke
OEM
Aggressive
Front Wheels
21×9.5 ET45
Rear Wheels
21×12 ET48
Documented build
Lip position vs. stock · F 20″ 9J ET51 · R 20″ 11.5J ET56
ET45 / ET48
Front12mm outRear14mm out
Sources
Documented
1 community
A wider 21-inch set: a 9.5-inch front for a 255 tire with a 12-inch rear on 325/25R21, about 12mm out front and 14mm at the rear. One centerlock car runs it. Both tire sizes stay within about 1% of the factory rolling diameters, so the front-to-rear ratio is close to stock.
Stance
flush → poke
OEM
Aggressive
Front Wheels
20×9 ET44
Rear Wheels
20×11.5 ET39
Documented build
Lip position vs. stock · F 9J ET51 · R 11.5J ET56
ET44 / ET39
Front7mm outRear17mm out
Sources
Documented
1 community
The factory widths at lower offsets: 20×9 ET44 with an 11.5-inch ET39 rear, about 7mm out front and 17mm at the rear of the factory Turbo S wheel, on factory tire sizes. One 991.1 Turbo S runs it. It's the step to take if you want a wider stance without changing tire sizes.
Stance
flush → poke
OEM
Aggressive
Front Wheels
20×9.5 ET50
Rear Wheels
21×12.5 ET48
Documented build
Lip position vs. stock · F 20″ 9J ET51 · R 20″ 11.5J ET56
ET50 / ET48
Front7mm outRear21mm out
Sources
Documented
1 community
The 991 GT3 RS and GT2 RS factory sizes on a Turbo: 20×9.5 ET50 with a 21×12.5 ET48 rear, about 7mm out front and 21mm at the rear. One owner runs it on 255/35R20 / 325/25R21 tires, which keep both axles within about 1% of the factory rolling diameters.
Stance
flush → poke
OEM
Aggressive
Front Wheels
20×9.5 ET46
Rear Wheels
20×12.5 ET48
Documented build
Lip position vs. stock · F 9J ET51 · R 11.5J ET56
ET46 / ET48
Front11mm outRear21mm out
Sources
Documented
1 community
The widest documented 20-inch setup: 20×9.5 ET46 with a 20×12.5 ET48 rear on 265 / 325 Cup 2 tires, about 11mm out front and 21mm at the rear. One owner runs it lowered with no rubbing, after a lower set of springs rubbed. Treat ride height as part of this setup.
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Our Process
What happens when you build with FMB
Built to the exact spec, not the closest one on a shelf. The setups above come from real 991 Turbo and Turbo S 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 991 Turbo and Turbo S 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 991 Turbo or Turbo S: made for your hub, either centerlock or 5×130 bored to the 71.6mm hub and machined for 60° conical lug bolts (or your factory ball-seat bolts if you request it when ordering), 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.
Start your 991 Turbo build →Common Questions
FAQ — Frequently Asked Questions
How do I tell if my 991 Turbo has centerlock or 5-lug wheels, and do centerlock builds apply to a 5-lug car?
Centerlock wheels have one large central nut; 5-lug wheels have five bolts. Every Turbo S came on centerlocks, and the Turbo on 5-lug hubs unless optioned. The wheels don't interchange, but both hubs share the body and brakes, so a documented offset sits in the same place on either car. Order the wheel for your hub.
What are the factory wheel specs on the 991 Turbo and Turbo S?
Every 991 Turbo and Turbo S runs 245/35ZR20 front and 305/30ZR20 rear tires. The Turbo S (2014–2019) and 991.2 Turbo (2017–2019) use 9J ET51 / 11.5J ET56 wheels. The 991.1 Turbo (2014–2016) uses 8.5J ET51 / 11J ET56. Porsche's 2017 spec sheet lists an ET52 rear for the Turbo S Cabriolet.
What are the hub and lug bolt specs?
5-lug cars use a 5×130 bolt pattern, 71.6mm center bore and M14×1.5 ball-seat lug bolts at 118 lb-ft (160 Nm); centerlock cars use one nut at 600 Nm. FMB machines 5-lug 991 Turbo wheels for 60° conical-seat bolts by default. If you want to keep your factory ball-seat bolts, tell us when you order; otherwise the wheels are machined for conical.
What aftermarket wheel sizes are documented on the 991 Turbo at stock ride height?
The most documented setup is 20×9 with a 20×12 rear. Three Turbo S cars in a vendor gallery run it at ET47 / ET47 on 245/305 or 255/315 tires with no changes listed, and a vendor lists ET52 / ET47 as an OEM+ setup on the factory tire sizes. Other sizes on this page are single 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 one documented build at its effective offset. The Front and Rear figures show how far the outer lip sits outside the 9J ET51 / 11.5J ET56 Turbo S wheel. The stance dots place each setup within the range documented on the 991 Turbo, from the mild end to the aggressive end.
What wheel sizes clear the 991 Turbo brakes?
The Turbo's steel brakes use 380mm rotors front and rear. Every Turbo S has ceramic brakes (PCCB) with 410mm front and 390mm rear rotors, optional on the Turbo, and a vendor lists 20-inch wheels as required to clear them. Every documented setup on this page is 20 or 21 inches; FMB's engineering check confirms caliper clearance.
Why is there no square setup, and do staggered setups work with the all-wheel drive?
Every factory and documented 991 Turbo setup is staggered, and we couldn't find a square setup with published offsets. Every Turbo is all-wheel drive, so the front-to-rear rolling diameter ratio matters: we document tire sizes on every card, and you should check them against your owner's manual, especially with a 21-inch rear.
Can I use wheel spacers on the 991 Turbo?
Porsche's 991 Turbo certificates list no spacers, and centerlock hubs don't take them. Owners on 5-lug cars document spacers, such as a 15mm rear spacer on one build here. Every spacer build on this page is listed at its effective offset, and FMB machines that offset into the wheel instead of using a spacer.
What are the factory winter wheel options?
Porsche's winter sets use 8.5J ET51 fronts with 11J rears on 245/35R20 / 295/30R20 tires: ET56 rears on 5-lug cars and ET59 centerlock rears. Rear snow chains are listed for the 295/30R20 tire. A 991.1 Turbo-only ET52 rear isn't approved with ceramic brakes. FMB can build a winter set to the same sizes.
Which model years and cars does this guide cover?
The 991 911 Turbo and Turbo S coupe and cabriolet: 991.1 for 2014–2016 and 991.2 for 2017–2019, including the 2018 Turbo S Exclusive Series. In the VIN, the 10th character is E to G for 2014–2016 and H to K for 2017–2019. The GT2 RS and GT3 RS share the Turbo-width body but have their own guide.
Will Carrera 4S, GTS or GT3 RS wheels fit a 991 Turbo?
The hub, bore and bolts match. The 991.2 Carrera 4S wheel (8.5J ET49 / 11.5J ET56) sits about 4mm in at the front, and the 991.2 GTS centerlock (9J ET51 / 12J ET63) about 1mm in at the rear. GT3 RS sizes sit 21mm out at the rear. The 991 Carrera 4 / GTS guide covers those cars.
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