Porsche 911 tire and wheel sizes
The Porsche 911 was approved in Switzerland between 1997 and 2025 with tires from 255/40R17 to 315/30R21 on 17″, 18″, 19″, 20″, 21″ wheels. The most common sizes are 245/35R20, 305/30R20, 235/40R19. Some versions use different sizes front and rear (staggered fitment).
Sizes differ by engine, trim and market. Confirm with the tire placard (usually on the driver's door jamb), the owner's manual or the vehicle registration papers before buying tires or wheels.
Most common sizes
Porsche 911 (2006–2025) type 997
55 approved versions, e.g. 911 Carrera 4S, 911 Carrera S, 911 Targa 4S, 911 Turbo S.
| Tire size | Axle | Load / speed | Rim and offset | Versions |
|---|---|---|---|---|
| 235/40R18 | Front | 91Y | 8Jx18 ET57 | 12 |
| 265/40R18 | Rear | 101Y | 10.5Jx18 ET60 | 4 |
| 295/35R18 | Rear | 99Y | 11Jx18 ET51 | 8 |
| 235/35R19 | Front | 87Y | 8Jx19 ET57, 8.5Jx19 ET53/55/56 | 53 |
| 245/35R19 | Front | 89Y | 9Jx19 ET47 | 5 |
| 295/30R19 | Rear | 100Y | 11Jx19 ET51/67 | 15 |
| 305/30R19 | Rear | 102Y | 11Jx19 ET51/67, 11.5Jx19 ET50/67, 12Jx19 ET63 | 49 |
| 325/30R19 | Rear | 101Y | 12Jx19 ET48/51 | 6 |
Porsche 911 (2019–2023) type 992
135 approved versions, e.g. 911 Carr 4S Cab, 911 GT3, 911 Carrera 4S, 911 Turbo S Cab.
| Tire size | Axle | Load / speed | Rim and offset | Versions |
|---|---|---|---|---|
| 235/40R19 | Front | 92V | 8.5Jx19 ET52 | 93 |
| 245/35R20 | Front | 91Y | 8.5Jx20 ET40/50/53, 9Jx20 ET43 | 135 |
| 255/35R20 | Front | 93Y | 9Jx20 ET41, 9.5Jx20 ET44/46 | 39 |
| 295/35R20 | Rear | 101V | 11Jx20 ET66, 11.5Jx20 ET67 | 93 |
| 295/30R21 | Rear | 98V | 11Jx21 ET66 | 72 |
| 305/30R21 | Rear | 100Y | 11Jx21 ET66, 11.5Jx21 ET46/67 | 135 |
| 315/30R21 | Rear | 105Y | 11.5Jx21 ET67, 12Jx21 ET45/70 | 39 |
Porsche 911 (2011–2022) type 991
188 approved versions, e.g. 911 Carrera 4S, 911 Carrera S, 911 Carrera 4SCab, 911 Targa 4GTS.
| Tire size | Axle | Load / speed | Rim and offset | Versions |
|---|---|---|---|---|
| 235/40R19 | Front | 92V | 8.5Jx19 ET50/54 | 65 |
| 285/35R19 | Rear | 103Y | 11Jx19 ET69 | 11 |
| 295/35R19 | Rear | 100V | 11Jx19 ET48/56/77, 11.5Jx19 ET56/76 | 54 |
| 245/35R20 | Front | 91Y | 8.5Jx20 ET49/51, 9Jx20 ET51/55 | 188 |
| 295/30R20 | Rear | 97V | 11Jx20 ET52/56/59/70/78 | 110 |
| 305/30R20 | Rear | 103Y | 11Jx20 ET52/56, 11.5Jx20 ET48/56/68/76, 12Jx20 ET47/63 | 188 |
Porsche 911 (1997–2003) type 996
26 approved versions, e.g. 911 Carrera Cabr., 911 Carrera 4, 911 Carrera 4 Cab, 911 Carrera.
| Tire size | Axle | Load / speed | Rim and offset | Versions |
|---|---|---|---|---|
| 205/50R17 | Front | — | 7Jx17 ET55 | 20 |
| 255/40R17 | Rear | — | 9Jx17 ET55 | 20 |
| 225/40R18 | Front | 88H | 7.5Jx18 ET50, 8Jx18 ET50/52 | 26 |
| 235/40R18 | Front | — | 8.5Jx18 ET40 | 3 |
| 265/35R18 | Rear | 93H | 10Jx18 ET47/65 | 26 |
| 285/30R18 | Rear | — | 10Jx18 ET65 | 5 |
| 295/30R18 | Rear | — | 11Jx18 ET45/63 | 4 |
| 315/30R18 | Rear | — | 12Jx18 ET45 | 1 |
How to read this table
Rim and offset uses the European notation: 7Jx17 ET45 is a 7-inch wide, 17-inch diameter wheel with a 45 mm offset. "Versions" is how many approved versions list that size — a rough guide to how common it is. Load / speed is the most frequent service description (for example 91V) among them; your car may require a higher one.
Showing 404 of 487 approvals: rare special versions are left out to keep the page readable. Records were read from the German-language text and checked against the French text; 97 % matched exactly.
Source: Swiss Federal Roads Office (FEDRO/ASTRA), open government data. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.