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OE fitment record · Porsche
2018 Porsche 911 tire sizes
Every factory tire size the 2018 Porsche 911 shipped with, by trim: front and rear sizes, factory wheel specs, and the stagger math where it applies.
At a glance
- Model years covered: 2018 (identical factory fitments)
- Factory setup: staggered on at least one trim
- OE sizes: 235/40R19 · 295/35R19 · 245/35R20 · 305/30R20 · 295/30R20 · 265/35R20 · 325/30R21
- Generation: VIII (991.2) Facelift
- Factory power range: 365–691 hp
Shop the widest OE size (325/30R21): Tire Rack → · SimpleTire → · local install partners on the buy page.
Factory fitments by trim
| Trim | Front | Rear | Setup |
|---|---|---|---|
| 3.0 Carrera 365 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11Jx19 ET77 | Staggered +2.8% Ø |
| 3.0 Carrera 365 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11.5Jx19 ET76 | Staggered +2.8% Ø |
| 3.0 Carrera 4 365 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11Jx19 ET56 | Staggered +2.8% Ø |
| 3.0 Carrera 4 365 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11Jx19 ET56 | Staggered +2.8% Ø |
| 3.0 Carrera 4 GTS 444 hp | 245/35R20 8.5Jx20 ET49 | 305/30R20 11.5Jx20 ET56 | Staggered +1.7% Ø |
| 3.0 Carrera S 414 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11Jx19 ET77 | Staggered +2.8% Ø |
| 3.0 Carrera S 414 hp | 245/35R20 8.5Jx20 ET49 | 305/30R20 11.5Jx20 ET76 | Staggered +1.7% Ø |
| 3.0 Targa 4 GTS 444 hp | 245/35R20 8.5Jx20 ET49 | 305/30R20 11.5Jx20 ET56 | Staggered +1.7% Ø |
| 3.0 Carrera GTS 444 hp | 245/35R20 8.5Jx20 ET49 | 305/30R20 11.5Jx20 ET56 | Staggered +1.7% Ø |
| 3.8 Turbo S 573 hp | 245/35R20 9Jx20 ET51 | 305/30R20 11.5Jx20 ET56 | Staggered +1.7% Ø |
| 3.8 Turbo 532 hp | 245/35R20 9Jx20 ET51 | 305/30R20 11.5Jx20 ET56 | Staggered +1.7% Ø |
| 3.8 Turbo 532 hp | 245/35R20 8.5Jx20 ET51 | 295/30R20 11Jx20 ET59 | Staggered +0.8% Ø |
| 3.0 Targa 4 GTS 444 hp | 245/35R20 9Jx20 ET51 | 305/30R20 12Jx20 ET63 | Staggered +1.7% Ø |
| 3.0 Carrera 4 GTS 444 hp | 245/35R20 9Jx20 ET51 | 305/30R20 12Jx20 ET63 | Staggered +1.7% Ø |
| 3.0 Carrera GTS 444 hp | 245/35R20 9Jx20 ET51 | 305/30R20 12Jx20 ET63 | Staggered +1.7% Ø |
| 3.0 Targa 4S 414 hp | 245/35R20 8.5Jx20 ET49 | 305/30R20 11.5Jx20 ET56 | Staggered +1.7% Ø |
| 3.0 Targa 4S 414 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11Jx19 ET56 | Staggered +2.8% Ø |
| 3.0 Targa 4 365 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11.5Jx19 ET56 | Staggered +2.8% Ø |
| 3.0 Targa 4 365 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11Jx19 ET56 | Staggered +2.8% Ø |
| 3.0 Carrera 4S 414 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11Jx19 ET56 | Staggered +2.8% Ø |
| 3.0 Carrera 4S 414 hp | 245/35R20 8.5Jx20 ET49 | 305/30R20 11.5Jx20 ET56 | Staggered +1.7% Ø |
| 4.0 GT3 493 hp | 245/35R20 9Jx20 ET55 | 305/30R20 12Jx20 ET47 | Staggered +1.7% Ø |
| 3.0 Carrera T 365 hp | 245/35R20 8.5Jx20 ET49 | 305/30R20 11.5Jx20 ET76 | Staggered +1.7% Ø |
| 3.0 Carrera T 365 hp | 235/40R19 8.5Jx19 ET50 | 295/35R19 11Jx19 ET77 | Staggered +2.8% Ø |
| 3.8 GT2 RS 691 hp | 265/35R20 9.5Jx20 ET50 | 325/30R21 12.5Jx21 ET48 | Staggered +5.0% Ø |
| 4.0 GT3 RS 514 hp | 265/35R20 9.5Jx20 ET50 | 325/30R21 12.5Jx21 ET48 | Staggered +5.0% Ø |
Versus the 2017 Porsche 911 record: trims gone: 3.8 GT3.
235 = tread width in millimetres · 40 = sidewall height as a percentage of that width · R19 = radial construction on a 19-inch wheel. Two sizes with the same overall diameter are speedometer-compatible, that is the whole game in staggering.
Run these sizes in the calculator: see the live verdict for 245/35R20 front + 295/30R20 rear →, or check any other pairing in the stagger calculator.
Fitment hardware
Dialing in how a setup sits on this platform? Hub-centric wheel spacers fine-tune effective offset and caliper clearance one axle at a time, aftermarket wheels usually need lug nuts in the matching seat and thread, and aggressive fitments bring adjustable control arms into play for camber. Code KSPAF takes 5% off at KSP Performance. Start with the measurement math in the wheel spacer sizing guide.
Checking an aftermarket stagger for this car? Run the pairing through the stagger calculator. OE fitment data from Wheel-Size.com; years and packages vary by market.
Always confirm against the tire placard on your driver-side door jamb and your actual wheel widths before ordering. Fitments here cover common factory and community setups. Years and packages vary.
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Porsche 911 by era
← 2017 · All Porsche 911 years → · 2019 →
Size deep-dives for every OE size above are linked in the tables; the full directory lives at /tire-sizes/ and /vehicles/.
// Sources & further reading
- Your vehicle’s tire placard (driver-side door jamb) & owner’s manual · The legally required OEM fitment record on every car, always the first authority.
- Tire and Rim Association (T&RA) standards · The US standards body whose yearbook defines size/rim pairing norms.
How we compile and verify fitment data: our methodology. Spot an error? fitment@staggeredsetup.com. Corrections ship fast.