Tire Size 255/40r20 in inches
The tire size 255/40R20 is equivalent to 28x10R20 in inches, has a diameter of 28 inches (712 mm), a section width of 10 inches (255 mm), a wheel diameter of 20 inches (508 mm), and is approved to be mounted on 8.5 – 10.0 inches (215.9 – 254 mm) wide wheels.
These dimensions allow us to fully understand the specifications of this tire size and its possible applications.
255/40r20 in inches
Enhance your understanding of measurements in inches and millimeters by using this Table chart.
| Feature | Inches | Metric |
|---|---|---|
| Tire Diameter | 28 | 712 |
| Section Width | 10 | 255 |
| Rim Height | 20 | 508 |
| Sidewall Height | 4 | 102 |
| Circumference | 88.1 | 2236.8 |
| Revolutions | 447 per km | 721 per mile |
| Rim Width Range | 8.5-10.0 | 215.9 – 254 |
How Tall Is A 255/40R20 Tire?
The Tire Height of the 255/40R20 tire size is 28 inches or 712 mm. This dimension is crucial for clearance and can greatly affect the vehicle’s ability to traverse different types of terrain, such as off-road conditions. Taller tires generally offer better clearance but may also affect fuel economy.
What Is the 255/40R20 Width In Inches?
The tread width of the 255/40R20 tire size is 10 inches or 255 mm. This measurement impacts the vehicle’s traction and stability on the road. A wider tread typically improves grip on dry pavement but can adversely impact handling in certain weather conditions, like heavy rain or snow.
What Is the 255/40R20 Sidewall Height?
The 255/40R20 tire’s sidewall height is approximately 4 inches or 102 mm. The sidewall height contributes to the tire’s flexibility and ride comfort. A shorter sidewall often translates to a stiffer tire, offering improved handling at the expense of ride comfort.
What Is the 255/40R20 Tire Circumference?
The circumference of the 255/40R20 tire size is approximately 88.1 inches or 2236.8 mm. This measure affects the overall tire revolutions per mile, which in turn affects the accuracy of the vehicle’s speedometer.
What Is the 255/40R20 Revolutions Per Mile?
For the 255/40R20 tire size, there are approximately 721 revolutions per mile or 447 revolutions per kilometer. This is important for understanding the tire’s overall performance, fuel efficiency, and the vehicle’s speedometer accuracy.
What Is the 255/40R20 Rims Size?
The 255/40R20 tire size, the rim diameter is 20 inches or 508 mm. This is an important specification for fitting the tire on the wheel. The tire’s width and sidewall ratio also need to be taken into account.
Fitment Guide
This table will guide you on which vehicle models are suitable for the 255/40R20 tire size. This information is necessary to ensure proper tire fitment and optimal performance.
| Brand Name | Model |
|---|---|
| ASTON MARTIN | DB11 (2016 – 2022), DBS Superleggera (2018 – 2022), Vantage (2018 – 2022) |
| AUDI | A6 (2012 – 2023), A6 Allroad (2012 – 2019), A6L (2019 – 2023), A7 (2018 – 2023), A7L (2022 – 2023), Q3 (2018 – 2023), Q3 Sportback (2019 – 2023), RS Q3 (2019 – 2023), RS Q3 Sportback (2019 – 2023), S6 (2019 – 2023), S7 (2019 – 2023) |
| BENTLEY | Brooklands (2008 – 2011), Continental Flying Spur (2005 – 2013), Continental GT (2003 – 2011), Continental GTC (2009 – 2011) |
| BMW ALPINA | B7 (2016 – 2022), XD3 (2013 – 2017) |
| CADILLAC | XTS (2013 – 2017) |
| CITROËN | C-Crosser (2007 – 2012) |
| DAEWOO | Winstorm (2006 – 2010) |
| DODGE | Magnum (2004 – 2009) |
| FAW AUDI | A6 (2018 – 2020), A6 Allroad (2018 – 2020) |
| HOLDEN | Captiva (2006 – 2018), Captiva 5 (2009 – 2015), Captiva 7 (2006 – 2018) |
| HONDA | Element (2003 – 2011) |
| HYUNDAI | Santa Fe (2012 – 2018) |
| INFINITI | EX (2008 – 2013), Q70 (2013 – 2021), QX50 (2013 – 2017) |
| KIA | Sportage (2021 – 2023) |
| LANCIA | Thema (2011 – 2014), Voyager (2011 – 2015) |
| LINCOLN | MKC (2014 – 2019) |
| MERCEDES-BENZ | EQE (2022 – 2023), GLA-Class AMG (2020 – 2023), GLB-Class AMG (2019 – 2023), GLK-Class (2008 – 2015), S-Class (2020 – 2023), S-Class AMG (2013 – 2021), S-Class Cabrio AMG (2016 – 2021), S-Class Coupe AMG (2014 – 2021) |
| MERCEDES-MAYBACH | S-Class (2021 – 2023) |
| NISSAN | GT-R (2007 – 2023) |
| PORSCHE | Panamera (2009 – 2016) |
| SEAT | Tarraco (2018 – 2023) |
| SKODA | Kodiaq (2016 – 2023), Kodiaq GT (2019 – 2023) |
| TESLA | Model S (2021 – 2023), Model Y (2020 – 2023) |
| VOLKSWAGEN | Tiguan (2016 – 2023), Tiguan Allspace (2017 – 2023), Tiguan L (2017 – 2023), Tiguan X (2020 – 2023) |
| VOLVO | C40 (2021 – 2024), XC40 (2020 – 2024), XC60 (2018 – 2023) |
Replacement Tire Size
Replacement tires have to be within 3% of the total diameter of the original tire size to ensure correct speedometer readings and handling characteristics.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 145/65R20 | 27.4″ | -2.20% |
| 235/40R20 | 27.4″ | -2.20% |
| 315/30R20 | 27.5″ | -2.00% |
| 275/35R20 | 27.6″ | -1.70% |
| 175/55R20 | 27.6″ | -1.70% |
| 215/45R20 | 27.6″ | -1.40% |
| 245/40R20 | 27.7″ | -1.10% |
| 325/30R20 | 27.7″ | -1.10% |
| 195/50R20 | 27.7″ | -1.10% |
| 165/60R20 | 27.8″ | -0.80% |
| 285/35R20 | 27.9″ | -0.60% |
| 335/30R20 | 28.0″ | -0.30% |
| 225/45R20 | 28.0″ | -0.30% |
| 155/65R20 | 28.0″ | -0.30% |
| 295/35R20 | 28.1″ | 0.30% |
| 345/30R20 | 28.2″ | 0.60% |
| 235/45R20 | 28.3″ | 1.10% |
| 265/40R20 | 28.3″ | 1.10% |
| 305/35R20 | 28.4″ | 1.40% |
| 245/45R20 | 28.7″ | 2.20% |
Our Observation
In our experience, the 255/40R20 tire size provides a balance between performance and comfort. Its 10-inch width gives good traction on various surfaces, and the 28-inch height offers reasonable clearance.
However, with a sidewall height of only 4 inches, ride comfort may be compromised on rougher surfaces. The rim width range of 8.5 to 10 inches provides flexibility in rim choices.
As always, the final tire selection should consider the vehicle’s specific requirements and the driving conditions it will face.
