Tire Size 245/40r20 in inches
The tire size 245/40R20 is equivalent to 27.7×9.6R20 in inches. This means that it has an overall diameter of 27.7 inches (704 mm), a section width of 9.6 inches (245 mm), a wheel diameter of 20 inches (508 mm), and it is approved to be mounted on wheels that are 8.0 to 9.5 inches (203.2 to 241.3 mm) wide.
245/40r20 in inches
With this Table chart, you can instantly comprehend intricate measurements in both inches and millimeters.
| Feature | Inches | Metric |
|---|---|---|
| Tire Diameter | 27.7 | 704 |
| Section Width | 9.6 | 245 |
| Rim Height | 20 | 508 |
| Sidewall Height | 3.9 | 98 |
| Circumference | 87.1 | 2211.7 |
| Revolutions | 728 per mile | 452 per km |
| Rim Width Range | 8.0-9.5 | 203.2 – 241.3 |
How Tall Is A 245/40R20 Tire?
The tire height of the 245/40R20 tire size is 27.7 inches (704 mm). This height, also known as the tire’s overall diameter, is the distance from the outer edge of the tire to the opposite outer edge, passing through the center.
This diameter gives the tire its general size, influences vehicle clearance, and contributes to the car’s performance at different speeds.
What Is the 245/40R20 Width In Inches?
The 245/40R20 tire’s tread width is 9.6 inches (245 mm). This measurement, often referred to as the section width, is the linear distance from one side of the tire’s tread to the other, excluding the sidewalls.
This dimension directly impacts the tire’s contact area with the road and significantly affects traction, cornering, and braking abilities.
What Is the 245/40R20 Sidewall Height?
The 245/40R20 tire’s sidewall height is 3.9 inches (98 mm). This is the distance from the edge of the rim to the start of the tread on the tire. It’s calculated as a percentage (the aspect ratio) of the section width.
In this case, 40% of 245 mm. The sidewall height contributes to ride comfort, as larger sidewalls generally offer more cushioning.
What Is the 245/40R20 Tire Circumference?
The circumference of the 245/40R20 tire size is 87.1 inches (2211.7 mm). This measurement is the total distance around the outer edge of the tire.
Knowing the tire’s circumference is useful for calculating its revolutions per mile, an important aspect in understanding fuel efficiency and speedometer accuracy.
What Is the 245/40R20 Revolutions Per Mile?
For the 245/40R20 tire size, there are approximately 728 revolutions per mile (452 revolutions per km). This figure describes how often the tire will rotate in one mile, directly affecting the car’s speed reading and fuel consumption.
What Is the 245/40R20 Rims Size?
The 245/40R20 tire’s rim diameter is 20 inches (508 mm). The rim’s width that this tire can safely be mounted on ranges from 8.0 to 9.5 inches (203.2 to 241.3 mm). The correct rim size is important to ensure the tire fits securely, providing optimal handling and performance.
Fitment Guide
This table will guide you on which vehicles the 245/40R20 tires can be used on. It is important to remember that different manufacturers can have different recommendations, so it’s crucial to check your vehicle’s manual or consult a tire expert.
| Brand Name | Model |
|---|---|
| ASTON MARTIN | One-77 (2009 – 2012), Rapide (2010 – 2014), Rapide AMR (2018 – 2020), Rapide S (2013 – 2019) |
| AUDI | RS6 (2013 – 2018), RS7 (2013 – 2018) |
| BMW | 5 Series Gran Turismo (2009 – 2017), 6 Series Gran Turismo (2017 – 2023), 7 Series (2001 – 2022), i8 (2013 – 2020), iX1 (2022 – 2023), X1 (2022 – 2023), X3 (2010 – 2017), X4 (2014 – 2018) |
| BMW ALPINA | B12 (1995 – 2001) |
| BUICK | Cascada (2016 – 2019), LaCrosse (2014 – 2023) |
| CADILLAC | CT6 (2016 – 2023), CT6-V (2019 – 2020), ELR (2014 – 2016), XTS (2013 – 2019) |
| CHEVROLET | Camaro (2016 – 2023), Impala (2014 – 2020) |
| CITROËN | C5 X (2021 – 2023) |
| DODGE | Challenger (2008 – 2010) |
| DS | DS 4 (2010 – 2023) |
| FAW | Hongqi E-HS3 (2018 – 2022), Hongqi H9 (2020 – 2023) |
| FORD | Maverick (2004 – 2007) |
| GENESIS | EQ900 (2015 – 2018), G80 (2020 – 2023), G90 (2016 – 2022) |
| HOLDEN | Cascada (2014 – 2017), Ute (2015 – 2017) |
| HYUNDAI | Equus (2009 – 2016), Grandeur (2022 – 2023), Ioniq 6 (2022 – 2023), Tucson (2015 – 2021) |
| INFINITI | M (2010 – 2014), Q70 (2013 – 2021), Q70L (2015 – 2020), QX50 (2013 – 2018) |
| JAGUAR | XJ (2009 – 2022) |
| KIA | K9 (2012 – 2023), K900 (2014 – 2022), Quoris (2015 – 2019), Sportage (2017 – 2022) |
| LEXUS | LS (2006 – 2017), NX (2014 – 2021) |
| LINCOLN | Continental (2017 – 2020) |
| MASERATI | Ghibli (2013 – 2023), Quattroporte (2013 – 2023) |
| MERCEDES-BENZ | E-Class All-Terrain (2017 – 2023), E-Class Coupe (2020 – 2023), S-Class (2013 – 2020), S-Class AMG (2013 – 2017), S-Class Cabrio (2016 – 2021), S-Class Cabrio AMG (2016 – 2017), S-Class Coupe (2015 – 2021), S-Class Coupe AMG (2014 – 2017) |
| MERCEDES-MAYBACH | S-Class (2014 – 2020) |
| MERCURY | Marauder (2003 – 2004) |
| NISSAN | Fuga (2009 – 2022) |
| OPEL | Astra GTC (2011 – 2018), Cabrio (2013 – 2019), Cascada (2013 – 2019) |
| PEUGEOT | 4007 (2007 – 2012), 408 (2022 – 2024), 408X (2023 – 2024), 5008 (2020 – 2023) |
| POLESTAR | Polestar 2 (2020 – 2022) |
| HONGQI | E-HS3 (2018 – 2022), H9 (2020 – 2023) |
| TESLA | Model S (2012 – 2021) |
| VAUXHALL | Astra GTC (2011 – 2018), Cascada (2013 – 2018), Insignia (2012 – 2013) |
| VOLVO | S90 (2016 – 2023), V60 Cross Country (2019 – 2023), V90 (2016 – 2023) |
| XPENG | P7 (2020 – 2022), P7i (2023 – 2023) |
Replacement Tire Size
Replacement tires have to be within 3% of the diameter of the original tire size to ensure the accuracy of your speedometer, among other things.
| Tire Size | Overall Diameter | Difference |
|---|---|---|
| 305/30R20 | 27.2″ | -1.70% |
| 155/60R20 | 27.3″ | -1.40% |
| 265/35R20 | 27.3″ | -1.40% |
| 145/65R20 | 27.4″ | -1.10% |
| 235/40R20 | 27.4″ | -1.10% |
| 315/30R20 | 27.5″ | -0.90% |
| 275/35R20 | 27.6″ | -0.60% |
| 175/55R20 | 27.6″ | -0.60% |
| 215/45R20 | 27.6″ | -0.30% |
| 195/50R20 | 27.7″ | 0.00% |
| 325/30R20 | 27.7″ | 0.00% |
| 165/60R20 | 27.8″ | 0.30% |
| 285/35R20 | 27.9″ | 0.60% |
| 155/65R20 | 28.0″ | 0.90% |
| 225/45R20 | 28.0″ | 0.90% |
| 335/30R20 | 28.0″ | 0.90% |
| 255/40R20 | 28.0″ | 1.10% |
| 295/35R20 | 28.1″ | 1.40% |
| 345/30R20 | 28.2″ | 1.70% |
Our Observation
The 245/40R20 tire size provides an excellent balance between performance and comfort. Its unique blend of width, sidewall height, and overall diameter allow it to perform well in various conditions.
While maintaining a smooth and comfortable ride. However, as with any tire size, ensuring it is the correct size for your specific vehicle model and driving conditions is crucial.
