What does the 225/40R18 tire marking mean?

225/40R18 is a metric tire code: section width in millimeters, aspect ratio (sidewall height as a percent of width), construction (R = radial), and rim diameter in inches. Always match load/speed ratings and verify overall diameter effects on your speedometer.

Why are several different vehicles listed for one tire size?

Many OEM applications reuse the same tire marking across makes, model years, and trims. This page groups catalog rows that reference the marking so you can compare wheel references and follow links to model-specific pages.

Is this official OEM documentation?

No—treat this dataset as a practical reference compiled from public-style fitment rows. Markets, packages, and factory options differ; verify the exact row for your VIN or tire placard before ordering.

225/40R18

Tire size lookup — every vehicle row in this catalog that lists 225/40R18 (278 references).

Use this page as a reverse index: jump to a make/model page for year-sorted context, or follow a bolt pattern link when you are also matching wheels. Trims and markets vary, so treat each row as a guide and confirm against your installed tires and manufacturer documentation.

From here you can open the tire sizes catalog or the bolt pattern catalog for broader browsing.

FAQ

What does the 225/40R18 tire marking mean?: 225/40R18 is a metric tire code: section width in millimeters, aspect ratio (sidewall height as a percent of width), construction (R = radial), and rim diameter in inches. Always match load/speed ratings and verify overall diameter effects on your speedometer.
Why are several different vehicles listed for one tire size?: Many OEM applications reuse the same tire marking across makes, model years, and trims. This page groups catalog rows that reference the marking so you can compare wheel references and follow links to model-specific pages.
Is this official OEM documentation?: No—treat this dataset as a practical reference compiled from public-style fitment rows. Markets, packages, and factory options differ; verify the exact row for your VIN or tire placard before ordering.

Vehicle	Year	Tire	Wheel	Bolt
Audi A3 (8L1) S3 quattro	2003	225/40R18	7.5" × 18"	5×100
Audi A3 (8L1) S3 quattro	2002	225/40R18	7.5" × 18"	5×100
Audi A3 (8L1) S3 quattro	2001	225/40R18	7.5" × 18"	5×100
Audi A3 (8L1) S3 quattro	2000	225/40R18	7.5" × 18"	5×100
Audi A3 (8L1) S3 quattro	1999	225/40R18	7.5" × 18"	5×100
Audi A3 (8V1) S3 quattro	2019	225/40R18	7.5" × 18"	5×112
Audi A3 (8V1) S3 quattro	2018	225/40R18	7.5" × 18"	5×112
Audi A3 (8V1) S3 quattro	2017	225/40R18	7.5" × 18"	5×112
Audi A3 (8V1) S3 quattro	2016	225/40R18	7.5" × 18"	5×112
Audi A3 (8V1) S3 quattro	2015	225/40R18	7.5" × 18"	5×112
Audi A3 (8V1) S3 quattro	2014	225/40R18	7.5" × 18"	5×112
Audi A3 (8V1) S3 quattro	2013	225/40R18	7.5" × 18"	5×112
Audi A3 (8V1) S3 quattro	2012	225/40R18	7.5" × 18"	5×112
Audi A3 Cabrio (8V7) S3 quattro	2019	225/40R18	7.5" × 18"	5×112
Audi A3 Cabrio (8V7) S3 quattro	2018	225/40R18	7.5" × 18"	5×112
Audi A3 Cabrio (8V7) S3 quattro	2017	225/40R18	7.5" × 18"	5×112
Audi A3 Cabrio (8V7) S3 quattro	2016	225/40R18	7.5" × 18"	5×112
Audi A3 Cabrio (8V7) S3 quattro	2015	225/40R18	7.5" × 18"	5×112
Audi A3 Cabrio (8V7) S3 quattro	2014	225/40R18	7.5" × 18"	5×112
Audi A3 Limousine (8VS) S3 quattro	2019	225/40R18	7.5" × 18"	5×112
Audi A3 Limousine (8VS) S3 quattro	2018	225/40R18	7.5" × 18"	5×112
Audi A3 Limousine (8VS) S3 quattro	2017	225/40R18	7.5" × 18"	5×112
Audi A3 Limousine (8VS) S3 quattro	2016	225/40R18	7.5" × 18"	5×112
Audi A3 Limousine (8VS) S3 quattro	2015	225/40R18	7.5" × 18"	5×112
Audi A3 Limousine (8VS) S3 quattro	2014	225/40R18	7.5" × 18"	5×112
Audi A3 Limousine (8VS) S3 quattro	2013	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) RS3 quattro	2019	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) S3 quattro	2019	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) RS3 quattro	2018	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) S3 quattro	2018	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) RS3 quattro	2017	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) S3 quattro	2017	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) RS3 quattro	2016	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) S3 quattro	2016	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) RS3 quattro	2015	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) S3 quattro	2015	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) S3 quattro	2014	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) S3 quattro	2013	225/40R18	7.5" × 18"	5×112
Audi A3 Sportback (8VA) S3 quattro	2012	225/40R18	7.5" × 18"	5×112
Audi A4 Avant (8D5, B5) RS4 quattro	2001	225/40R18	8" × 18"	5×112
Audi A4 Avant (8D5, B5) RS4 quattro	2000	225/40R18	8" × 18"	5×112
Chrysler Crossfire 3.2	2008	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire 3.2	2007	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire SRT-6	2007	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire 3.2	2006	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire SRT-6	2006	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire 3.2	2005	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire SRT-6	2005	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire 3.2	2004	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire SRT-6	2004	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire 3.2	2003	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire Roadster 3.2	2008	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire Roadster 3.2	2007	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire Roadster 3.2	2006	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire Roadster SRT-6	2006	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire Roadster 3.2	2005	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire Roadster SRT-6	2005	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire Roadster 3.2	2004	225/40R18	7.5" × 18"	5×112
Chrysler Crossfire Roadster SRT-6	2004	225/40R18	7.5" × 18"	5×112
Ferrari 355 F1 Berlinetta 3.5	1999	225/40R18	8" × 18"	5×108
Ferrari 355 F1 Berlinetta 3.5	1998	225/40R18	8" × 18"	5×108
Ferrari 355 F1 Berlinetta 3.5	1997	225/40R18	8" × 18"	5×108
Ferrari 355 F1 Berlinetta 3.5	1996	225/40R18	8" × 18"	5×108
Ferrari 355 F1 Berlinetta 3.5	1995	225/40R18	8" × 18"	5×108
Ferrari 355 F1 Berlinetta 3.5	1994	225/40R18	8" × 18"	5×108
Ferrari 355 F1 GTS 3.5 Spider	2000	225/40R18	8" × 18"	5×108
Ferrari 355 F1 GTS 3.5 Spider	1999	225/40R18	8" × 18"	5×108
Ferrari 355 F1 GTS 3.5 Spider	1998	225/40R18	8" × 18"	5×108
Ferrari 355 F1 GTS 3.5 Spider	1997	225/40R18	8" × 18"	5×108
Ferrari 355 F1 GTS 3.5 Spider	1996	225/40R18	8" × 18"	5×108
Ferrari 355 F1 GTS 3.5 Spider	1995	225/40R18	8" × 18"	5×108
Ferrari 355 F1 GTS 3.5 Spider	1994	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 ST	2012	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 RS	2011	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 RS 500	2011	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 ST	2011	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 RS	2010	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 RS 500	2010	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 ST	2010	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 RS	2009	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 ST	2009	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 ST	2008	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 ST	2007	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 ST	2006	225/40R18	8" × 18"	5×108
Ford Focus II 2.5 ST	2005	225/40R18	8" × 18"	5×108
Honda Civic VIII Hatchback (FN, FK) Type R	2019	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2018	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2017	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2016	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2015	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2014	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2013	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2012	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2011	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2010	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2009	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2008	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2007	225/40R18	7.5" × 18"	5×114.3
Honda Civic VIII Hatchback (FN, FK) Type R	2006	225/40R18	7.5" × 18"	5×114.3
Mercedes C-Class (W204) C 63 AMG	2014	225/40R18	7.5" × 18"	5×112
Mercedes C-Class (W204) C 63 AMG	2013	225/40R18	7.5" × 18"	5×112
Mercedes C-Class (W204) C 63 AMG	2012	225/40R18	7.5" × 18"	5×112
Mercedes C-Class (W204) C 63 AMG	2011	225/40R18	7.5" × 18"	5×112
Mercedes C-Class (W204) C 63 AMG	2010	225/40R18	7.5" × 18"	5×112
Mercedes C-Class (W204) C 63 AMG	2009	225/40R18	7.5" × 18"	5×112
Mercedes C-Class (W204) C 63 AMG	2008	225/40R18	7.5" × 18"	5×112
Mercedes C-Class Coupe (C204) C 63 AMG	2019	225/40R18	7.5" × 18"	5×112
Mercedes C-Class Coupe (C204) C 63 AMG	2018	225/40R18	7.5" × 18"	5×112
Mercedes C-Class Coupe (C204) C 63 AMG	2017	225/40R18	7.5" × 18"	5×112
Mercedes C-Class Coupe (C204) C 63 AMG	2016	225/40R18	7.5" × 18"	5×112
Mercedes C-Class Coupe (C204) C 63 AMG	2015	225/40R18	7.5" × 18"	5×112
Mercedes C-Class Coupe (C204) C 63 AMG	2014	225/40R18	7.5" × 18"	5×112
Mercedes C-Class Coupe (C204) C 63 AMG	2013	225/40R18	7.5" × 18"	5×112
Mercedes C-Class Coupe (C204) C 63 AMG	2012	225/40R18	7.5" × 18"	5×112
Mercedes C-Class Coupe (C204) C 63 AMG	2011	225/40R18	7.5" × 18"	5×112
Mercedes C-Class T-Model (S204) C 63 AMG	2014	225/40R18	7.5" × 18"	5×112
Mercedes C-Class T-Model (S204) C 63 AMG	2013	225/40R18	7.5" × 18"	5×112
Mercedes C-Class T-Model (S204) C 63 AMG	2012	225/40R18	7.5" × 18"	5×112
Mercedes C-Class T-Model (S204) C 63 AMG	2011	225/40R18	7.5" × 18"	5×112
Mercedes C-Class T-Model (S204) C 63 AMG	2010	225/40R18	7.5" × 18"	5×112
Mercedes C-Class T-Model (S204) C 63 AMG	2009	225/40R18	7.5" × 18"	5×112
Mercedes C-Class T-Model (S204) C 63 AMG	2008	225/40R18	7.5" × 18"	5×112
Mercedes SL-Class (R231) 500	2019	225/40R18	8.5" × 18"	5×112
Mercedes SL-Class (R231) 500	2018	225/40R18	8.5" × 18"	5×112
Mercedes SL-Class (R231) 500	2017	225/40R18	8.5" × 18"	5×112
Mercedes SL-Class (R231) 500	2016	225/40R18	8.5" × 18"	5×112
Mercedes SL-Class (R231) 500	2015	225/40R18	8.5" × 18"	5×112
Mercedes SL-Class (R231) 500	2014	225/40R18	8.5" × 18"	5×112
Mercedes SL-Class (R231) 500	2013	225/40R18	8.5" × 18"	5×112
Mercedes SL-Class (R231) 500	2012	225/40R18	8.5" × 18"	5×112
MG X-Power 4.6 SV	2008	225/40R18	8" × 18"	5×108
MG X-Power 5.0 SV-R	2008	225/40R18	8" × 18"	5×108
MG X-Power 4.6 SV	2007	225/40R18	8" × 18"	5×108
MG X-Power 5.0 SV-R	2007	225/40R18	8" × 18"	5×108
MG X-Power 4.6 SV	2006	225/40R18	8" × 18"	5×108
MG X-Power 5.0 SV-R	2006	225/40R18	8" × 18"	5×108
MG X-Power 4.6 SV	2005	225/40R18	8" × 18"	5×108
MG X-Power 5.0 SV-R	2005	225/40R18	8" × 18"	5×108
MG X-Power 4.6 SV	2004	225/40R18	8" × 18"	5×108
MG X-Power 4.6 SV	2003	225/40R18	8" × 18"	5×108
Porsche 911 3.6 Carrera	2026	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2026	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2026	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2026	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2025	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2025	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2025	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2025	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2024	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2024	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2024	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2024	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2023	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2023	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2023	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2023	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2022	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2022	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2022	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2022	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2021	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2021	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2021	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2021	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2020	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2020	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2020	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2020	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Turbo	2012	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Turbo S	2012	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2011	225/40R18	8" × 18"	5×130
Porsche 911 3.8 GT3	2011	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Turbo	2011	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Turbo S	2011	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2010	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Carrera S	2010	225/40R18	8" × 18"	5×130
Porsche 911 3.8 GT3	2010	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Turbo	2010	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Turbo S	2010	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2009	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2009	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2009	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Carrera S	2009	225/40R18	8" × 18"	5×130
Porsche 911 3.8 GT3	2009	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Turbo	2009	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2008	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2008	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2008	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Carrera S	2008	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2007	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2007	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2007	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Carrera S	2007	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Carrera	2006	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2006	225/40R18	8" × 18"	5×130
Porsche 911 3.6 Turbo	2006	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Carrera S	2006	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2005	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2005	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Carrera S	2005	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2004	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2004	225/40R18	8" × 18"	5×130
Porsche 911 3.8 Carrera S	2004	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2003	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2003	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2002	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2002	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT2	2001	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2001	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	2000	225/40R18	8" × 18"	5×130
Porsche 911 3.6 GT3	1999	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera 4	2012	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4 GTS	2012	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Turbo	2012	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Turbo S	2012	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera	2011	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera 4	2011	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4 GTS	2011	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4S	2011	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera GTS	2011	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera S	2011	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Turbo	2011	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Turbo S	2011	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera	2010	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera 4	2010	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4 GTS	2010	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4S	2010	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera GTS	2010	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera S	2010	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Turbo	2010	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Turbo S	2010	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera	2009	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera 4	2009	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Turbo	2009	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4 GTS	2009	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4S	2009	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera GTS	2009	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera S	2009	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Turbo	2009	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera	2008	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera 4	2008	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Turbo	2008	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4S	2008	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera S	2008	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera	2007	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera 4	2007	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Turbo	2007	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4S	2007	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera S	2007	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera	2006	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.6 Carrera 4	2006	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4S	2006	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera S	2006	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera 4S	2005	225/40R18	8" × 18"	5×130
Porsche 911 Cabrio 3.8 Carrera S	2005	225/40R18	8" × 18"	5×130
Volvo V70 II (SW) 2.5 T	2007	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 T AWD	2007	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 TDI	2007	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) R 2,5 T AWD	2007	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 T	2006	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 T AWD	2006	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 TDI	2006	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) R 2,5 T AWD	2006	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 T	2005	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 T AWD	2005	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 TDI	2005	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) R 2,5 T AWD	2005	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 T	2004	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 T AWD	2004	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 TDI	2004	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) R 2,5 T AWD	2004	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 T AWD	2003	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 TDI	2003	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) R 2,5 T AWD	2003	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 T AWD	2002	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 TDI	2002	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 TDI	2001	225/40R18	7.5" × 18"	5×108
Volvo V70 II (SW) 2.5 TDI	2000	225/40R18	7.5" × 18"	5×108

Tire size calculatorShow

Compare two tire sizes — diameter, speedometer error, and clearance change.

WidthHeightRadius

inch

	Size 1	Size 2	Diff	Diff(%)
Diameter	25.0"	25.4"	0.5"	1.89%
Width	7.7"	8.5"	0.8"	10.26%
Circumference	78.4"	79.9"	1.5"	1.86%
Profile height	5.0"	4.2"	-0.7"	-15.08%
Turnover per mile	807	793	14	-1.73%
Clearance	-	-	+0.2"	-

25.0"

7.7"

25.5"

8.5"

15"

5.0"

17"

4.2"

Speedometer Error

(First wheel OEM size)

Reading	20 mph	30 mph	40 mph	50 mph	60 mph	70 mph	80 mph	90 mph
Actual	20.4	30.5	40.7	50.9	61.1	71.2	81.4	91.6