Tire Size 225/55r18 in inches
The tire size 225/55R18 is equivalent to 27.7×8.9R18 in inches, has a diameter of 27.7 inches (704.7 millimeters), a section width of 8.9 inches (225 millimeters), a wheel diameter of 18 inches (457 millimeters), and is approved to be mounted on 6.0-8.0 inches (152.4 – 203.2 millimeters) wide wheels. This size denotes a tire that can deliver excellent performance for numerous vehicles, emphasizing balanced handling and comfort.
225/55r18 in inches
This table chart presents a unified view of detailed measurements in both inches and millimeters at the same time.
| Feature | Inches | Metric |
|---|---|---|
| Tire Diameter | 27.7 | 704.7 |
| Section Width | 8.9 | 225 |
| Rim Height | 18 | 457 |
| Sidewall Height | 4.9 | 123.8 |
| Circumference | 87.2 | 2213.9 |
| Revolutions | 452 per km | 726 per mile |
| Rim Width Range | 6.0-8.0 | 152.4 – 203.2 |
How Tall Is A 225/55R18 Tire?
The Tire Height of the 225/55R18 tire size is 27.7 inches or 704.7 millimeters. This measurement is also known as the tire’s overall diameter, which is calculated by doubling the sidewall height and adding the diameter of the wheel. The tire’s height is important because it affects the overall handling and performance of the vehicle, as well as the compatibility with the wheel well and suspension components.
What Is the 225/55R18 Width In Inches?
The tread width of the 225/55R18 tire size is 8.9 inches or 225 millimeters. This dimension, referred to as the section width, represents the linear distance between the outer sidewalls of an inflated tire without any load. The tire’s width influences the contact patch area and hence the grip and handling characteristics of the vehicle.
What Is the 225/55R18 Sidewall Height?
The sidewall height of the 225/55R18 tire size is 4.9 inches or 123.8 millimeters. The sidewall height, also known as the aspect ratio, is the vertical distance from the rim’s edge to the tire’s outer tread surface when it’s mounted and properly inflated. The aspect ratio, expressed as a percentage, affects the ride quality and handling response.
What Is the 225/55R18 Tire Circumference?
The 225/55R18 tire’s circumference is approximately 87.2 inches or 2213.9 millimeters. The tire circumference, or the total distance around the tire, directly impacts the vehicle’s speedometer calibration. A tire with a larger circumference will travel farther with each rotation than a smaller one.
What Is the 225/55R18 Revolutions Per Mile?
For the 225/55R18 tire size, there are approximately 726 revolutions per mile or 452 revolutions per kilometer. This figure, the number of times a tire will revolve in one mile of distance, is useful for various calculations, including gear ratio selection, speedometer calibration, and fuel consumption estimations.
What Is the 225/55R18 Rims Size?
The 225/55R18 tire size, the rim diameter is 18 inches or 457 millimeters. This size is compatible with a rim width range between 6.0-8.0 inches or 152.4 – 203.2 millimeters. This compatibility range ensures optimal tire performance, safety, and longevity.
Fitment Guide
This table will guide you on which vehicle makes, and models are suitable for the 225/55R18 tire size. It’s crucial to consider your vehicle’s compatibility with these tires for the best performance and safety outcomes.
| Brand Name | Model |
|---|---|
| ALFA ROMEO | Tonale (2022 – 2023) |
| ASTON MARTIN | V8 Vantage (1977 – 1990) |
| AUDI | A6 (2018 – 2023), A6L (2019 – 2023), A7 (2018 – 2023), A7L (2022 – 2023) |
| BAIC | BJ20 (2016 – 2020) |
| BAOJUN | RC-6 (2019 – 2020), RS-5 (2019 – 2020) |
| BMW | iX1 (2022 – 2023), X1 (2022 – 2023) |
| BUICK | Encore (2020 – 2023), Encore GX (2020 – 2024), Envista (2022 – 2023), Envista GS (2022 – 2023), GL8 (2011 – 2023), GL8 ES (2021 – 2023) |
| BYD | Song MAX (2021 – 2022) |
| CHANGAN | CS55 (2017 – 2022), CS55 Plus (2019 – 2021) |
| CHANGHE | Q7 (2018 – 2020) |
| CHERY | Tiggo 4 (2018 – 2022), Tiggo 5x (2019 – 2022), Tiggo 5x Pro (2022 – 2022) |
| CHEVROLET | Captiva (2019 – 2023), Seeker (2022 – 2023), TrailBlazer (2019 – 2023) |
| CHRYSLER | Grand Voyager (1995 – 2007), Town & Country (2001 – 2007), Voyager (2001 – 2007) |
| CITROËN | Beyond (2022 – 2023), C-Crosser (2007 – 2012), C4 Aircross (2012 – 2017), C5 Aircross (2017 – 2023), C5 X (2021 – 2023) |
| DACIA | Duster (2019 – 2023) |
| DODGE | Caravan (2001 – 2007), Grand Caravan (2001 – 2007), Hornet (2023 – 2023), Magnum (2004 – 2009) |
| DONGFENG | Glory 580 (2016 – 2023), Glory 580 Pro (2020 – 2022), Glory 580 Red Star (2022 – 2023), Glory E3 (2019 – 2022), Fengon 580 (2020 – 2023), Glory i-Auto (2020 – 2023), Forthing M7 (2022 – 2023), Fengdu MX6 (2015 – 2016), Glory S560 (2018 – 2023) |
| DR | 4.0 (2021 – 2022) |
| DS | DS 4 (2010 – 2023), DS 7 (2023 – 2024) |
| EVOLUTE | i-JOY (2022 – 2023) |
| FAW | Bestune B70S (2022 – 2023), Bestune T55 (2021 – 2023), Bestune X80 (2013 – 2023), Hongqi HQ9 (2022 – 2023) |
| FIAT | Toro (2016 – 2023) |
| FORD | Five Hundred (2005 – 2007), Taurus (2008 – 2009) |
| GAC | GN8 (2020 – 2022), M8 (2021 – 2022), GM8 (2017 – 2021), GS3 (2017 – 2022), GS5 Sport (2015 – 2015) |
| GEELY | Emgrand X7 (2018 – 2021), Haoyue (2020 – 2022), Jiaji (2019 – 2022), Okavango (2020 – 2022) |
| HAVAL | Red Rabbit (2021 – 2023), Jolion (2021 – 2023), Cool Dog (2022 – 2023) |
| HAWTAI | Santa Fe 5 (2017 – 2020) |
| HONDA | Element (2003 – 2011), HR-V (2023 – 2023), ZR-V (2022 – 2023) |
| HUANSU | S7 (2017 – 2020) |
| HYUNDAI | Grand Starex (2017 – 2021), Grandeur (2022 – 2023), Ioniq 6 (2022 – 2023), ix35 (2009 – 2023), Kusto (2021 – 2023), Nexo (2018 – 2023), Tucson (2010 – 2021) |
| INFINITI | EX (2008 – 2013), QX50 (2013 – 2018) |
| JAC | JS8 (2021 – 2022), Refine M5 (2012 – 2022), S5 (2013 – 2021), T6 (2015 – 2018), T8 (2014 – 2016) |
| JEEP | Cherokee (2014 – 2022), Compass (2006 – 2023), Renegade (2014 – 2023) |
| KIA | KX5 (2016 – 2022), Sportage (2015 – 2022), Sportage Ace (2021 – 2023) |
| LEXUS | LM (2019 – 2023), RX (2000 – 2003) |
| LIFAN | X70 (2018 – 2022) |
| MAXUS | EG10 (2016 – 2020), G10 (2014 – 2021), G20 (2019 – 2020) |
| MERCURY | Marquis (1969 – 1982), Sable (2008 – 2009) |
| MG | One (2021 – 2022) |
| MITSUBISHI | ASX (2010 – 2023), Delica D:5 (2007 – 2023), Eclipse Cross (2017 – 2023), Outlander (2005 – 2023), Outlander Sport (2010 – 2023), RVR (2010 – 2023), RVR Roadest (2011 – 2017), Triton (2005 – 2015) |
| NISSAN | Dualis (2007 – 2013), Dualis+2 (2010 – 2013), Elgrand (2010 – 2023), Qashqai (2007 – 2013), Qashqai+2 (2008 – 2013), Rogue (2011 – 2013), Skyline Crossover (2009 – 2016), Stagea (2001 – 2007), X-Trail (2010 – 2015), X-Trail x-treme (2014 – 2016) |
| OPEL | Grandland (2021 – 2023), Grandland X (2017 – 2023) |
| ORA | Ballet Cat (2022 – 2022) |
| PEUGEOT | 3008 (2016 – 2022), 4007 (2007 – 2012), 4008 (2012 – 2022), 5008 (2017 – 2022) |
| PONTIAC | Montana (2006 – 2009) |
| HONGQI | HQ9 (2022 – 2023) |
| RENAULT | Koleos (2007 – 2015) |
| RENAULT SAMSUNG | QM5 (2008 – 2016) |
| ROEWE | iMAX8 (2020 – 2022) |
| SATURN | Relay (2005 – 2007), Vue (2008 – 2010) |
| SEHOL | X6 (2022 – 2022), X8 (2020 – 2022) |
| SERES | 3 (2022 – 2023) |
| SSANGYONG | Actyon (2011 – 2021), Korando (2010 – 2022), Korando С (2017 – 2021), Rodius (2004 – 2013), Stavic (2005 – 2013) |
| SUBARU | Crosstrek (2018 – 2023), Forester (2012 – 2023), Legacy Outback (2009 – 2014), Outback (2009 – 2015), XV (2017 – 2023) |
| TOYOTA | Century (2018 – 2023) |
| VAUXHALL | Grandland (2021 – 2023), Grandland X (2017 – 2021) |
| WEICHAI | U70 (2020 – 2020) |
| WELTMEISTER | EX5 (2018 – 2022), EX5-Z (2020 – 2022), EX6 Plus (2020 – 2021), W6 (2021 – 2022) |
| WEY | Macchiato (2021 – 2022) |
Replacement Tire Size
Replacement tires have to be within 3% of the total tire diameter of your original tires to avoid altering the speedometer, torque, and performance. The 225/55R18 size can be replaced by sizes that maintain safe and efficient performance.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 285/40R18 | 27.0″ (685 mm) | -2.8% |
| 325/35R18 | 27.0″ (685 mm) | -2.8% |
| 255/45R18 | 27.0″ (687 mm) | -2.6% |
| 145/80R18 | 27.1″ (689 mm) | -2.3% |
| 165/70R18 | 27.1″ (689 mm) | -2.3% |
| 295/40R18 | 27.3″ (693 mm) | -1.7% |
| 235/50R18 | 27.3″ (693 mm) | -1.7% |
| 215/55R18 | 27.3″ (693 mm) | -1.7% |
| 265/45R18 | 27.4″ (695 mm) | -1.4% |
| 345/35R18 | 27.5″ (699 mm) | -0.9% |
| 305/40R18 | 27.6″ (701 mm) | -0.6% |
| 205/60R18 | 27.7″ (703 mm) | -0.3% |
| 145/85R18 | 27.7″ (703 mm) | -0.3% |
| 245/50R18 | 27.7″ (703 mm) | -0.3% |
| 275/45R18 | 27.8″ (705 mm) | 0.0% |
| 155/80R18 | 27.8″ (705 mm) | 0.0% |
| 315/40R18 | 27.9″ (709 mm) | 0.6% |
| 255/50R18 | 28.1″ (713 mm) | 1.1% |
| 285/45R18 | 28.1″ (713 mm) | 1.1% |
| 235/55R18 | 28.1″ (715 mm) | 1.4% |
| 155/85R18 | 28.4″ (721 mm) | 2.3% |
| 265/50R18 | 28.5″ (723 mm) | 2.6% |
| 295/45R18 | 28.5″ (723 mm) | 2.6% |
Our Observation
In our experience, the 225/55R18 tire size provides a balanced blend of performance, comfort, and fuel efficiency. Its everyday use in many types of vehicles indicates its versatility and reliability. As always, the specific tire model also plays a significant role in the overall performance, so choose wisely.
