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Porsche 996 (911) tyre sizes

All factory fitments by generation and engine — 9 sizes across 5 generations.
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Quick answer

The most common tyre size on the Porsche 996 (911) is 225/40R18 (overall diameter ≈ 637 mm). Exact fitment depends on generation and engine — full breakdown below.

911 (996) 1997 - 2006 - Coupe (1997–2006)

EngineTyre sizes
911 Carrera 3.4 - 300 PS - Benzin - 3387 Hubraum205/50R17 225/40R18 225/45R17 255/40R17 265/35R18 285/30R18
911 Carrera 3.4 - 320 PS - Benzin - 3387 Hubraum205/50R17 225/40R18 225/45R17 255/40R17 265/35R18 285/30R18
911 Carrera 4 3.4 - 300 PS - Benzin - 3387 Hubraum205/50R17 225/40R18 225/45R17 255/40R17 265/35R18 285/30R18
911 Carrera 4S 3.4 - 320 PS - Benzin - 3387 Hubraum205/50R17 225/40R18 225/45R17 255/40R17 265/35R18 285/30R18
911 GT2 3.6 - 462 PS - Benzin - 3600 Hubraum225/40R18 235/40R18 265/35R18 315/30R18
911 GT2 3.6 - 483 PS - Benzin - 3600 Hubraum225/40R18 235/40R18 265/35R18 315/30R18
911 GT3 3.6 - 360 PS - Benzin - 3600 Hubraum225/40R18 265/35R18 285/30R18
911 GT3 RS 3.6 - 381 PS - Benzin - 3600 Hubraum225/40R18 235/40R18 265/35R18 295/30R18
911 Turbo 3.6 - 420 PS - Benzin - 3600 Hubraum225/40R18 265/35R18 295/30R18
911 Turbo 3.6 - 450 PS - Benzin - 3600 Hubraum225/40R18 265/35R18 295/30R18

911 Carrera (996) 1997 - 2006 - Convertible (1997–2006)

EngineTyre sizes
911 Carrera 3.4 Cabrio - 300 PS - Benzin - 3387 Hubraum205/50R17 225/40R18 225/45R17 255/40R17 265/35R18 285/30R18
911 Carrera 3.6 Cabrio - 320 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18
911 Carrera 3.6 Cabrio - 345 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18
911 Carrera 4 3.4 Cabrio - 300 PS - Benzin - 3387 Hubraum205/50R17 225/40R18 225/45R17 255/40R17 265/35R18 285/30R18
911 Carrera 4 3.4 Cabrio - 320 PS - Benzin - 3387 Hubraum205/50R17 225/40R18 225/45R17 255/40R17 265/35R18 285/30R18
911 Carrera S 3.4 Cabrio - 320 PS - Benzin - 3387 Hubraum205/50R17 225/40R18 225/45R17 255/40R17 265/35R18 285/30R18

911 Carrera (996) 1997 - 2006 - Coupe (1997–2006)

EngineTyre sizes
911 Carrera 3.6 - 320 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18
911 Carrera 3.6 - 345 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18
911 Carrera 4 3.6 - 320 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18
911 Carrera 4 3.6 - 345 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18 295/30R18
911 Carrera 4S 3.6 - 320 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18
911 Carrera 4S 3.6 - 345 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18 295/30R18

911 Turbo (996) 1997 - 2006 - Convertible (1997–2006)

EngineTyre sizes
911 Carrera 4S 3.6 Cabrio - 320 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18
911 Carrera 4S 3.6 Cabrio - 345 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18 295/30R18
911 Turbo 3.6 Cabrio - 420 PS - Benzin - 3600 Hubraum225/40R18 265/35R18 295/30R18
911 Turbo 3.6 Cabrio - 450 PS - Benzin - 3600 Hubraum225/40R18 265/35R18 295/30R18

911 Targa (996) 1997 - 2006 - Coupe (1997–2006)

EngineTyre sizes
911 Targa 3.6 - 320 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18
911 Targa 3.6 - 345 PS - Benzin - 3596 Hubraum205/50R17 225/40R18 255/40R17 265/35R18 285/30R18
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Related: all cars using 225/40R18 · all vehicles