Porsche 911 Tires
Porsche 911 spans one of the longest and most influential runs in sports car history, beginning in 1965 and evolving from a compact air-cooled rear-engine coupe into a far more powerful modern performance platform by 2026. That long production arc matters because Porsche 911 tire fitment changed repeatedly as wheel diameters, tire widths, and performance targets advanced across generations. Early cars stayed on narrow 15-inch radials, while later Porsche 911 applications moved through 16-, 17-, 18-, 19-, 20-, and 21-inch fitments, sometimes with several combinations listed in the same model year. The first thing to confirm on any Porsche 911 is the actual wheel diameter before narrowing down the correct front and rear sizes.
Porsche 911 Tire Size Guide
Porsche 911 fitment changed from 15-inch to 16-inch wheels in 1979, and later applications expanded further to 17-, 18-, 19-, 20-, and 21-inch wheel diameters. Across 1965 to 2026, this model group uses 39 distinct tire sizes, so year alone is not enough to identify the correct fitment. These sizes are written in modern metric radial format, where the final number is the wheel diameter in inches and the other numbers describe section width and profile.
165R15 is the early Porsche 911 size used from 1965 through 1974. The 165 indicates a 165 mm section width, the R indicates radial construction, and the 15 matches a 15-inch rim diameter. Choose this size for early narrow-wheel Porsche 911 applications and confirm whether the car uses blackwall, narrow whitewall, or wide whitewall styling.
185/70R15 appears on Porsche 911 models from 1969 through 1986 and overlaps with other sizes during part of that run. The 185 indicates a 185 mm section width, 70 is the aspect ratio, R means radial construction, and the size fits a 15-inch rim. Choose this size for mid-period 15-inch Porsche 911 applications and verify whether the car calls for a narrower early setup or a wider companion rear size.
215/60R15 is a wider 15-inch Porsche 911 fitment used from 1974 through 1988. The 215 indicates a 215 mm section width, 60 is the aspect ratio, R means radial construction, and the tire fits a 15-inch rim. Choose this size when the car carries the wider 15-inch setup and pay attention to available blackwall, whitewall, redline, or raised white letter sidewall styles.
205/55R16 was used on Porsche 911 from 1979 through 1998 and marks the move into 16-inch wheel fitments. The 205 indicates a 205 mm section width, 55 is the aspect ratio, R means radial construction, and the tire fits a 16-inch rim. Choose this size for the appropriate front or all-around 16-inch applications and verify the wheel width because listed products span several rim-width ranges.
225/50R16 served Porsche 911 applications from 1979 through 1994, typically as a wider companion to other 16-inch sizes. The 225 indicates a 225 mm section width, 50 is the aspect ratio, R means radial construction, and the tire mounts on a 16-inch rim. Choose this size only if the car is equipped with the corresponding wider 16-inch wheel setup rather than the narrower 15-inch arrangement used on some overlapping years.
195/65R15 is a short-run Porsche 911 size used in 1987 and 1988. The 195 indicates a 195 mm section width, 65 is the aspect ratio, R means radial construction, and the tire fits a 15-inch rim. Choose this size only for those late 15-inch applications and confirm it carefully against the wheel and the companion rear size on the car.
245/45R16 appears on Porsche 911 in 1987 through 1989 and again in 1995 through 1998. The 245 indicates a 245 mm section width, 45 is the aspect ratio, R means radial construction, and the tire fits a 16-inch rim. Choose this size only when the car uses the wider 16-inch rear-wheel setup and note that it is not listed continuously through every year between those ranges.
205/50R17 was used on Porsche 911 from 1989 through 2005 as 17-inch fitments became common. The 205 indicates a 205 mm section width, 50 is the aspect ratio, R means radial construction, and the tire fits a 17-inch rim. Choose this size for the correct 17-inch front application and confirm that the car is not one of the overlapping 16-inch or 18-inch configurations offered in the same era.
255/40R17 is the wider 17-inch Porsche 911 size used from 1989 through 2005. The 255 indicates a 255 mm section width, 40 is the aspect ratio, R means radial construction, and the tire fits a 17-inch rim. Choose this size when the car carries the matching wider 17-inch wheel package and verify front and rear sizes as a set rather than by rear tire alone.
225/40R18 appears on Porsche 911 models from 1994 through 2005. The 225 indicates a 225 mm section width, 40 is the aspect ratio, R means radial construction, and the tire fits an 18-inch rim. Choose this size for the appropriate 18-inch front fitment and check that the car is not instead using a 17-inch package from the same model year range.
265/35R18 was used on Porsche 911 from 1994 through 2001 and again in 2004 and 2005. The 265 indicates a 265 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits an 18-inch rim. Choose this size only when the car uses the corresponding wider 18-inch rear setup, since other rear 18-inch sizes overlap in nearby years.
285/30R18 appears on Porsche 911 in 1996 through 1998 and again from 2002 through 2005. The 285 indicates a 285 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits an 18-inch rim. Choose this size only for the specific 18-inch rear applications that call for it, since 265/35R18, 295/30R18, and 315/30R18 also appear in this broader period.
295/30R18 is a Porsche 911 rear fitment used from 2001 through 2005. The 295 indicates a 295 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits an 18-inch rim. Choose this size only if the car is equipped with that specific wider 18-inch rear package rather than one of the other 18-inch rear sizes listed in the same years.
235/40R18 served Porsche 911 applications from 2002 through 2013. The 235 indicates a 235 mm section width, 40 is the aspect ratio, R means radial construction, and the tire fits an 18-inch rim. Choose this size for the correct 18-inch front setup and confirm it against the rear size because multiple staggered combinations were offered in these years.
315/30R18 is a very wide Porsche 911 rear size used from 2002 through 2005. The 315 indicates a 315 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits an 18-inch rim. Choose this size only when the wheel and body configuration clearly call for the widest 18-inch rear fitment in that period.
235/35R19 appears on Porsche 911 from 2005 through 2013 as 19-inch front fitments entered the range. The 235 indicates a 235 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits a 19-inch rim. Choose this size for the proper 19-inch front application and confirm whether the car pairs it with an 18-inch, 19-inch, or 20-inch rear setup depending on year.
265/40R18 was used on Porsche 911 from 2005 through 2012. The 265 indicates a 265 mm section width, 40 is the aspect ratio, R means radial construction, and the tire fits an 18-inch rim. Choose this size only where the car retains the matching 18-inch rear configuration, since 19-inch rear pairings also appear during the same general era.
295/30R19 served Porsche 911 rear applications from 2005 through 2013. The 295 indicates a 295 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 19-inch rim. Choose this size for the corresponding 19-inch rear setup and note that later cars in this broader family moved on to different 19-, 20-, and 21-inch combinations.
295/35R18 appears on Porsche 911 models from 2006 through 2013. The 295 indicates a 295 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits an 18-inch rim. Choose this size when the car uses the 18-inch rear arrangement and check sidewall styling carefully because blackwall, redline, and RWL versions are listed.
305/30R19 is a Porsche 911 rear size used from 2006 through 2013. The 305 indicates a 305 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 19-inch rim. Choose this size only for the wider 19-inch rear application and pay attention to available blackwall, redline, and raised white letter sidewall options.
325/30R19 appears on Porsche 911 during 2008 through 2011. The 325 indicates a 325 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 19-inch rim. Choose this size only when the car clearly carries the widest 19-inch rear configuration from those years.
245/35R19 is a short-run Porsche 911 size used in 2010 and 2011. The 245 indicates a 245 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits a 19-inch rim. Choose this size only for those specific front applications and verify it against the complete staggered setup already on the car.
235/40R19 is a long-running Porsche 911 size used from 2012 through 2026. The 235 indicates a 235 mm section width, 40 is the aspect ratio, R means radial construction, and the tire fits a 19-inch rim. Choose this size for the appropriate front application and confirm whether the rear axle is paired with 19-, 20-, or 21-inch fitments in the same production era.
245/35R20 appears on Porsche 911 from 2012 through 2026. The 245 indicates a 245 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits a 20-inch rim. Choose this size for the correct 20-inch front fitment and verify it against the rear size because several staggered combinations share the same model years.
285/35R19 served Porsche 911 rear applications from 2012 through 2015. The 285 indicates a 285 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits a 19-inch rim. Choose this size only when the rear wheel package matches this 19-inch specification rather than the alternative 20-inch rear combinations used at the same time.
295/30R20 is a Porsche 911 rear fitment used from 2012 through 2015. The 295 indicates a 295 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 20-inch rim. Choose this size only for the matching 20-inch rear setup and not as a substitute for the 19-inch rear alternatives listed in overlapping years.
295/35R19 appears on Porsche 911 from 2013 through 2019. The 295 indicates a 295 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits a 19-inch rim. Choose this size for the corresponding rear 19-inch application and confirm the front size because 19-inch and 20-inch fronts can overlap within this general era.
305/30R20 served Porsche 911 rear applications from 2013 through 2019. The 305 indicates a 305 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 20-inch rim. Choose this size for the wider 20-inch rear arrangement and pay attention to sidewall styling where blackwall, redline, and RWL options are offered.
265/35R20 appears on Porsche 911 from 2016 through 2019. The 265 indicates a 265 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits a 20-inch rim. Choose this size only for the specific 20-inch front or rear application it supports on the car, since neighboring years use several other 20-inch sizes.
325/30R21 is a Porsche 911 rear size used from 2016 through 2019 and again in 2026. The 325 indicates a 325 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 21-inch rim. Choose this size only when the car carries the corresponding 21-inch rear wheel package rather than the 19-inch or 20-inch alternatives found elsewhere in the range.
295/35R20 appears on Porsche 911 from 2020 through 2026. The 295 indicates a 295 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits a 20-inch rim. Choose this size for the matching rear 20-inch application and verify whether the front axle uses 19-inch or 20-inch tires on the specific car.
305/30R21 served Porsche 911 rear applications from 2020 through 2026. The 305 indicates a 305 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 21-inch rim. Choose this size only where the car is equipped with the 21-inch rear setup and not one of the earlier 19-inch or 20-inch rear packages.
255/35R20 appears on Porsche 911 from 2021 through 2026. The 255 indicates a 255 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits a 20-inch rim. Choose this size for the proper 20-inch front application and note that blackwall, redline, and RWL sidewall treatments are available in this size.
315/30R21 is a Porsche 911 rear size used from 2021 through 2026. The 315 indicates a 315 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 21-inch rim. Choose this size only if the car carries the later 21-inch rear setup rather than the 305/30R21 or 335/30R21 alternatives used in nearby years.
245/45R19 appears on Porsche 911 in 2023 and 2024. The 245 indicates a 245 mm section width, 45 is the aspect ratio, R means radial construction, and the tire fits a 19-inch rim. Choose this size only for those specific 19-inch front applications and confirm it against the matching rear size on the car.
295/40R20 is a Porsche 911 rear fitment used in 2023 and 2024. The 295 indicates a 295 mm section width, 40 is the aspect ratio, R means radial construction, and the tire fits a 20-inch rim. Choose this size only when the car uses that taller-profile 20-inch rear combination rather than the more common 295/35R20 setup.
275/35R20 appears on Porsche 911 from 2023 through 2025. The 275 indicates a 275 mm section width, 35 is the aspect ratio, R means radial construction, and the tire fits a 20-inch rim. Choose this size for the correct 20-inch application and note that blackwall, redline, and RWL versions are listed.
335/30R21 is one of the widest Porsche 911 rear sizes in this range, used from 2023 through 2026. The 335 indicates a 335 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 21-inch rim. Choose this size only for the latest high-width 21-inch rear configuration and confirm the front size from the exact year listing.
275/30R20 is a one-year Porsche 911 size listed for 2026. The 275 indicates a 275 mm section width, 30 is the aspect ratio, R means radial construction, and the tire fits a 20-inch rim. Choose this size only for a 2026 configuration that specifically calls for it rather than the 275/35R20 fitment used in earlier adjacent years.
Buyers with a 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1994, 1995, 1996, 1997, 1998, 2002, 2003, 2004, 2005, 2012, 2013, 2023, 2024, 2025, or 2026 Porsche 911 need to identify the specific configuration rather than the year alone, because those years include multiple rim diameters.
Porsche 911 Tires by Year
The year listing below shows which tire sizes are associated with each Porsche 911 model year and is the fastest way to narrow the range before comparing products. Porsche 911 production changed from 15-inch to 16-inch wheels in 1979, then continued into 17-, 18-, 19-, 20-, and 21-inch combinations, so confirm which rim diameter the specific car carries before selecting a tire. In 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1994, 1995, 1996, 1997, 1998, 2002, 2003, 2004, 2005, 2012, 2013, 2023, 2024, 2025, and 2026, more than two sizes are listed, reflecting different wheel-diameter and staggered front-to-rear combinations.
1965 Porsche 911
- 165R15
1966 Porsche 911
- 165R15
1967 Porsche 911
- 165R15
1968 Porsche 911
- 165R15
1969 Porsche 911
- 165R15
- 185/70R15
1970 Porsche 911
- 165R15
- 185/70R15
1971 Porsche 911
- 165R15
- 185/70R15
1972 Porsche 911
- 165R15
- 185/70R15
1973 Porsche 911
- 165R15
- 185/70R15
1974 Porsche 911
- 165R15
- 185/70R15
- 215/60R15
1975 Porsche 911
- 185/70R15
- 215/60R15
1976 Porsche 911
- 185/70R15
- 215/60R15
1977 Porsche 911
- 185/70R15
1978 Porsche 911
- 185/70R15
- 215/60R15
1979 Porsche 911
- 185/70R15
- 205/55R16
- 215/60R15
- 225/50R16
1980 Porsche 911
- 185/70R15
- 205/55R16
- 215/60R15
- 225/50R16
1981 Porsche 911
- 185/70R15
- 205/55R16
- 215/60R15
- 225/50R16
1982 Porsche 911
- 185/70R15
- 205/55R16
- 215/60R15
- 225/50R16
1983 Porsche 911
- 185/70R15
- 205/55R16
- 215/60R15
- 225/50R16
1984 Porsche 911
- 185/70R15
- 205/55R16
- 215/60R15
- 225/50R16
1985 Porsche 911
- 185/70R15
- 205/55R16
- 215/60R15
- 225/50R16
1986 Porsche 911
- 185/70R15
- 205/55R16
- 215/60R15
- 225/50R16
1987 Porsche 911
- 195/65R15
- 205/55R16
- 215/60R15
- 225/50R16
- 245/45R16
1988 Porsche 911
- 195/65R15
- 205/55R16
- 215/60R15
- 225/50R16
- 245/45R16
1989 Porsche 911
- 205/50R17
- 205/55R16
- 225/50R16
- 255/40R17
- 245/45R16
1990 Porsche 911
- 205/50R17
- 205/55R16
- 225/50R16
- 255/40R17
1991 Porsche 911
- 205/50R17
- 205/55R16
- 225/50R16
- 255/40R17
1992 Porsche 911
- 205/50R17
- 205/55R16
- 225/50R16
- 255/40R17
1993 Porsche 911
- 205/50R17
- 205/55R16
- 225/50R16
- 255/40R17
1994 Porsche 911
- 205/50R17
- 205/55R16
- 225/50R16
- 255/40R17
- 225/40R18
- 265/35R18
1995 Porsche 911
- 205/50R17
- 255/40R17
- 205/55R16
- 225/40R18
- 245/45R16
- 265/35R18
1996 Porsche 911
- 205/50R17
- 255/40R17
- 225/40R18
- 285/30R18
- 205/55R16
- 245/45R16
- 265/35R18
1997 Porsche 911
- 205/50R17
- 255/40R17
- 225/40R18
- 285/30R18
- 205/55R16
- 245/45R16
- 265/35R18
1998 Porsche 911
- 205/50R17
- 255/40R17
- 225/40R18
- 285/30R18
- 265/35R18
- 205/55R16
- 245/45R16
1999 Porsche 911
- 205/50R17
- 255/40R17
- 225/40R18
- 265/35R18
2000 Porsche 911
- 205/50R17
- 255/40R17
- 225/40R18
- 265/35R18
2001 Porsche 911
- 205/50R17
- 255/40R17
- 225/40R18
- 265/35R18
- 295/30R18
2002 Porsche 911
- 205/50R17
- 225/40R18
- 255/40R17
- 285/30R18
- 235/40R18
- 315/30R18
- 295/30R18
2003 Porsche 911
- 205/50R17
- 225/40R18
- 255/40R17
- 285/30R18
- 235/40R18
- 315/30R18
- 295/30R18
2004 Porsche 911
- 235/40R18
- 295/30R18
- 205/50R17
- 225/40R18
- 255/40R17
- 265/35R18
- 285/30R18
- 315/30R18
2005 Porsche 911
- 205/50R17
- 225/40R18
- 255/40R17
- 285/30R18
- 295/30R18
- 235/35R19
- 235/40R18
- 265/40R18
- 295/30R19
- 265/35R18
- 315/30R18
2006 Porsche 911
- 235/35R19
- 235/40R18
- 265/40R18
- 295/30R19
- 295/35R18
- 305/30R19
2007 Porsche 911
- 235/35R19
- 235/40R18
- 265/40R18
- 295/30R19
- 295/35R18
- 305/30R19
2008 Porsche 911
- 235/35R19
- 235/40R18
- 265/40R18
- 295/30R19
- 295/35R18
- 305/30R19
- 325/30R19
2009 Porsche 911
- 235/35R19
- 235/40R18
- 265/40R18
- 295/30R19
- 295/35R18
- 305/30R19
- 325/30R19
2010 Porsche 911
- 235/35R19
- 235/40R18
- 265/40R18
- 295/30R19
- 295/35R18
- 305/30R19
- 245/35R19
- 325/30R19
2011 Porsche 911
- 235/35R19
- 235/40R18
- 265/40R18
- 295/30R19
- 295/35R18
- 305/30R19
- 245/35R19
- 325/30R19
2012 Porsche 911
- 235/40R19
- 245/35R20
- 285/35R19
- 295/30R20
- 235/35R19
- 235/40R18
- 265/40R18
- 295/30R19
- 305/30R19
- 295/35R18
2013 Porsche 911
- 235/40R19
- 245/35R20
- 285/35R19
- 295/30R20
- 295/35R19
- 305/30R20
- 235/35R19
- 235/40R18
- 295/30R19
- 295/35R18
- 305/30R19
2014 Porsche 911
- 245/35R20
- 295/30R20
- 305/30R20
- 235/40R19
- 285/35R19
- 295/35R19
2015 Porsche 911
- 235/40R19
- 245/35R20
- 305/30R20
- 295/35R19
- 285/35R19
- 295/30R20
2016 Porsche 911
- 235/40R19
- 245/35R20
- 295/35R19
- 305/30R20
- 265/35R20
- 325/30R21
2017 Porsche 911
- 235/40R19
- 245/35R20
- 305/30R20
- 295/35R19
- 265/35R20
- 325/30R21
2018 Porsche 911
- 235/40R19
- 245/35R20
- 305/30R20
- 295/35R19
- 265/35R20
- 325/30R21
2019 Porsche 911
- 235/40R19
- 245/35R20
- 305/30R20
- 295/35R19
- 265/35R20
- 325/30R21
2020 Porsche 911
- 235/40R19
- 245/35R20
- 295/35R20
- 305/30R21
2021 Porsche 911
- 235/40R19
- 245/35R20
- 295/35R20
- 305/30R21
- 255/35R20
- 315/30R21
2022 Porsche 911
- 235/40R19
- 245/35R20
- 305/30R21
- 295/35R20
- 255/35R20
- 315/30R21
2023 Porsche 911
- 235/40R19
- 245/35R20
- 305/30R21
- 295/35R20
- 245/45R19
- 295/40R20
- 255/35R20
- 315/30R21
- 275/35R20
- 335/30R21
2024 Porsche 911
- 235/40R19
- 245/35R20
- 305/30R21
- 295/35R20
- 245/45R19
- 295/40R20
- 255/35R20
- 315/30R21
- 275/35R20
- 335/30R21
2025 Porsche 911
- 245/35R20
- 315/30R21
- 235/40R19
- 295/35R20
- 305/30R21
- 255/35R20
- 275/35R20
- 335/30R21
2026 Porsche 911
- 245/35R20
- 315/30R21
- 305/30R21
- 235/40R19
- 295/35R20
- 255/35R20
- 275/30R20
- 335/30R21
- 325/30R21
Best Porsche 911 Tires for Sale
Available Porsche 911 tire options span 9 brands and 95 products across selected 15-, 16-, 17-, 18-, 19-, and 20-inch sizes. Confirm the exact year, size combination, and wheel diameter on the car before selecting a tire.
165R15 Products
These are the available products for 165R15.
185/70R15 Products
These are the available products for 185/70R15.
215/60R15 Products
These are the available products for 215/60R15.
205/55R16 Products
These are the available products for 205/55R16.
225/50R16 Products
These are the available products for 225/50R16.
205/50R17 Products
These are the available products for 205/50R17.
255/40R17 Products
These are the available products for 255/40R17.
225/40R18 Products
These are the available products for 225/40R18.
265/35R18 Products
These are the available products for 265/35R18.
235/40R18 Products
These are the available products for 235/40R18.
235/35R19 Products
These are the available products for 235/35R19.
265/40R18 Products
These are the available products for 265/40R18.
295/35R18 Products
These are the available products for 295/35R18.
305/30R19 Products
These are the available products for 305/30R19.
245/35R19 Products
These are the available products for 245/35R19.
235/40R19 Products
These are the available products for 235/40R19.
245/35R20 Products
These are the available products for 245/35R20.
285/35R19 Products
These are the available products for 285/35R19.
295/35R19 Products
These are the available products for 295/35R19.
305/30R20 Products
These are the available products for 305/30R20.
265/35R20 Products
These are the available products for 265/35R20.
295/35R20 Products
These are the available products for 295/35R20.
255/35R20 Products
These are the available products for 255/35R20.
245/45R19 Products
These are the available products for 245/45R19.
295/40R20 Products
These are the available products for 295/40R20.
275/35R20 Products
These are the available products for 275/35R20.
275/30R20 Products
These are the available products for 275/30R20.
Frequently Asked Questions
The FAQ below addresses the Porsche 911 size changes from 15-inch to 21-inch wheel fitments, how to sort out years with several listed combinations, and what the available sidewall styles, brands, and tire series mean for different eras of 911 ownership.
Size Basics & Fitment
Porsche 911 uses a long list of sizes across its 1965-2026 production span: 165R15, 185/70R15, 215/60R15, 195/65R15, 205/55R16, 225/50R16, 245/45R16, 205/50R17, 255/40R17, 225/40R18, 265/35R18, 285/30R18, 295/30R18, 235/40R18, 315/30R18, 265/40R18, 295/35R18, 235/35R19, 295/30R19, 305/30R19, 325/30R19, 245/35R19, 235/40R19, 285/35R19, 295/35R19, 245/45R19, 245/35R20, 295/30R20, 305/30R20, 265/35R20, 295/35R20, 255/35R20, 275/35R20, 295/40R20, 275/30R20, 325/30R21, 305/30R21, 315/30R21, and 335/30R21. Their rim diameters are the last number in the size code: 15, 16, 17, 18, 19, 20, or 21 inches.
The practical takeaway is that Porsche 911 fitment is highly year- and configuration-specific, especially from the late 1970s onward when multiple front and rear combinations appear in the same year. Start with the exact model year, then verify the wheel diameter on the car, and finally confirm whether you are matching a square setup or a staggered front-and-rear combination.
165R15 is an early Porsche 911 size used from 1965 through 1974. The 165 identifies the tire's section width in millimeters, the R means radial construction, and the 15 means the tire fits a 15-inch wheel. It is an older Euro-metric style size because it does not show an aspect ratio in the code, unlike later sizes such as 185/70R15 or 205/55R16.
That matters because a Porsche 911 wearing 165R15 should be treated as an early narrow-wheel application, not as a generic 15-inch fitment. If your car falls in the overlap years where 165R15 appears alongside 185/70R15, compare the actual wheel diameter and the existing front-and-rear setup before changing sizes.
A 1979 Porsche 911 has four listed sizes because that year spans more than one wheel-diameter and front-to-rear combination. The listed sizes are 185/70R15 and 215/60R15 on 15-inch wheels, plus 205/55R16 and 225/50R16 on 16-inch wheels. That is a rim-diameter split rather than a single interchangeable group of four tires.
The practical step is to identify the wheel package already on your Porsche 911 before selecting any tire. Measure or confirm whether the car is on 15-inch or 16-inch wheels, then match the proper front and rear pair rather than choosing a size simply because it appears in the same model year.
Porsche 911 uses multiple rim diameters across its production span. Early applications use 15-inch wheels, 16-inch sizes begin in 1979, 17-inch sizes appear in 1989, 18-inch sizes appear in 1994, 19-inch sizes appear in 2005, 20-inch sizes appear in 2012, and 21-inch sizes appear in 2016. The rim diameter is the last number in the modern metric size code, such as 205/55R16 or 305/30R21.
That makes wheel diameter the first fitment check on any Porsche 911, especially in years where several combinations overlap. Read the size molded on the current tire, confirm it matches the wheel actually fitted to the car, and then compare front and rear sizes together so the replacement set stays consistent with the car's intended configuration.
Buying the Right Tire
The correct Porsche 911 tire size comes from a combination of model year, wheel diameter, and whether the car uses a staggered front-and-rear setup. A 1960s 911 may use 165R15, a late 1970s or 1980s car may use either 15-inch or 16-inch sizes, and later generations expand into 17-, 18-, 19-, 20-, and 21-inch combinations. Many years list more than two sizes because different wheel packages were used in the same year.
Start by reading the size molded on the tires currently fitted to the Porsche 911, then confirm the wheel diameter stamped or measured on the car, and finally compare front and rear sizes as a set. If the car has been modified over time, original paperwork, option records, or a Porsche specialist can help separate factory-style fitment from later wheel changes.
Porsche 911 tires in the listed range are available in several sidewall styles, including blackwall, narrow whitewall, wide whitewall, redline, and RWL raised white letters. Early sizes such as 165R15 and 185/70R15 include whitewall options alongside blackwall, while many later performance sizes are blackwall only. Some later sizes such as 295/35R18, 305/30R19, 305/30R20, 255/35R20, and 275/35R20 also appear in redline and RWL versions.
For most period-correct Porsche 911 restorations and driver-grade cars, blackwall remains the most natural visual choice, especially on sport-oriented applications. Whitewall, redline, or RWL styling can make sense for a custom look, but it is worth deciding whether your goal is concours-style authenticity, era-flavored personalization, or a more modern performance presentation.
The listed Porsche 911 tire options come from Coker Classic, American Classic, Firestone, BFGoodrich, Michelin, Vredestein, Dunlop, Avon, Nitto, and Pro-Trac. Not every brand appears in every size. Early 15-inch Porsche 911 sizes show the broadest mix of touring and period-style brands, while many later high-performance sizes are concentrated among BFGoodrich, Nitto, and Pro-Trac.
Brand choice should follow the role of the car as much as the size itself. A lightly driven early Porsche 911 may call for a more period-looking radial, while a later performance-oriented 911 often benefits from choosing among the brands available in its exact front and rear fitment pair so the set remains visually and dynamically consistent.
Porsche 911 tire options include touring-style and performance-oriented series such as Coker Classic Radial, American Classic Radial, Star Series, Firestone F560 Radial, Michelin XZX, Michelin XAS, Michelin XWX, Michelin Pilot Sport, Michelin SX MXX3 N2, Vredestein Sprint Classic, Vredestein Sprint Plus, Vredestein Snow Classic, Dunlop Sport Classic, Avon CR6ZZ, BFGoodrich Silvertown Radial, BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, Nitto NT555 G2, and Pro-Trac Street Pro III. Those series differ in tread style, visual character, sidewall treatments, and intended balance between period appearance and modern performance feel.
The useful way to sort them is by the car's purpose. An early Porsche 911 kept close to period style may suit a classic-looking radial series, while a later 911 on larger wheels may be better matched to a more contemporary performance radial family. Once the correct size is confirmed, the series choice becomes a matter of how original, aggressive, or versatile you want the finished setup to feel.
Maintenance & Longevity
A stored Porsche 911 should be kept in a cool, dry, dark space away from ozone sources such as electric motors, battery chargers, welders, and air compressors. Tires last better when they are protected from sunlight, large temperature swings, and long periods of sitting on dirty or damp concrete. Clean tires and proper inflation before storage also help preserve casing shape.
If the Porsche 911 will sit for extended periods, move it occasionally so the tires do not rest on one contact patch for months at a time. For longer-term storage, many collectors prefer reducing vehicle load with cradles or stands while keeping the suspension supported appropriately, especially on valuable early 911s or cars with expensive staggered high-performance tire sets.
Tires on a Porsche 911 should be inspected regularly even if the car is driven very little. A visual check before each drive is sensible on any collector or performance car, and a more thorough inspection several times a year should include tread condition, sidewall cracking, impact damage, age-related hardening, and inflation pressure. Staggered Porsche 911 setups also deserve close checks for uneven wear front to rear.
Frequent inspection matters because many Porsche 911s are low-mileage cars that age their tires out before they wear them out. If the car sees spirited driving, highway use, or long seasonal storage, include a careful review of alignment wear and wheel condition so a size issue, pressure issue, or suspension issue does not get mistaken for a tire problem.
Tires on a Porsche 911 should be replaced when age, cracking, hardening, impact damage, repeated air loss, or visible structural concerns appear, even if tread depth still looks acceptable. Collector cars and lightly used performance cars often age out a tire long before the tread is consumed. Replacement decisions should consider calendar age and condition together, not tread alone.
That is especially important on Porsche 911 because many models use staggered setups and rear-biased weight distribution, both of which place real demands on the tire even in ordinary driving. If the car still wears an older set installed years ago, a professional inspection is wise before any sustained road use, particularly if the tires have spent long periods parked or underinflated.
Safety & Road Use
A Porsche 911 can be safely driven on public roads when the car is fitted with the correct size, the tires are in sound condition, and the full front-and-rear setup matches the wheel package on the car. The listed products are all radial constructions, but they still vary by size, profile, and intended character from period-style touring fitments to more modern performance-oriented designs.
Road safety depends on choosing the exact size combination the Porsche 911 actually uses and on keeping those tires properly inflated and regularly inspected. A mismatched staggered setup, aged rubber, or an incorrect wheel diameter will affect handling far more than brand name alone, so fitment accuracy and condition should come first.
Before driving a Porsche 911, check inflation pressure, visible tire condition, tread and sidewall damage, and whether the front and rear sizes still match the wheel setup fitted to the car. On a model range that spans 15-inch through 21-inch wheels, it is also wise to confirm that all four tires are the intended sizes for that specific configuration. Any vibration, pull, or rubbing deserves attention before further use.
That pre-drive routine is especially valuable on collector Porsche 911s and on cars that are used seasonally. A quick look can catch aging, underinflation, or a prior owner's size change before it turns into a handling problem, and it helps ensure the car behaves as expected under braking, turn-in, and acceleration.
The appropriate speed for a Porsche 911 depends on the exact tire fitted, its age, and its present condition rather than the model name alone. Even when a size is correct, a decades-old or deteriorated tire should not be treated like a fresh performance tire. Later Porsche 911 models in particular can quickly exceed the comfort zone of aging rubber.
Collector-car practice favors moderation until the Porsche 911's tires have been inspected, properly inflated, and confirmed to be suitable for road use. If the car is newly acquired, has unknown-age tires, or has been parked for long periods, keep speeds conservative until the entire setup has been evaluated and any age-related concerns addressed.