Tire Size 255/45r20 in inches

The tire size 255/45R20 is equivalent to 29x10R20 in inches, has a diameter of 29 inches (737.5 mm), a section width of 10 inches (255 mm), a wheel diameter of 20 inches (508 mm), and is approved to be mounted on 8.0-9.5 inches (203.2 – 241.3 mm) wide wheels. This tire size offers an excellent balance between performance, comfort, and safety in various road conditions.

255/45r20 in inches

This Table chart enables instant comprehension of precise measurements in inches and millimeters together.

FeatureInchesMetric
Tire Diameter29737.5
Section Width10255
Rim Height20508
Sidewall Height4.5114.8
Circumference91.22316.9
Revolutions432 per km693 per mile
Rim Width Range8.0-9.5203.2 – 241.3

How Tall Is A 255/45R20 Tire?

The Tire Height of the 255/45R20 tire size is approximately 29 inches (737.5 mm). This measurement represents the overall diameter of the tire, a crucial factor to consider when evaluating fitment and ground clearance. The tire’s height is critical in handling characteristics and speedometer accuracy.

What Is the 255/45R20 Width In Inches?

The 255/45R20 tire’s tread width is approximately 10 inches (255 mm). This size offers a broad contact patch with the road, ensuring optimal traction and stability. However, the width can affect the vehicle’s rolling resistance and fuel efficiency. Hence it’s important to consider this when choosing a tire size.

What Is the 255/45R20 Sidewall Height?

The 255/45R20 tire’s sidewall height is approximately 4.5 inches (114.8 mm). This dimension influences ride comfort, as a taller sidewall tends to provide a smoother ride due to its ability to absorb road imperfections. Conversely, a shorter sidewall often produces a stiffer ride but improves handling and cornering performance.

What Is the 255/45R20 Tire Circumference?

The circumference of the 255/45R20 tire size is approximately 91.2 inches (2316.9 mm). The tire’s circumference influences the vehicle’s speedometer calibration. A larger circumference will cause the speedometer to read slower than the actual speed, while a smaller circumference will result in a faster reading.

What Is the 255/45R20 Revolutions Per Mile?

For the 255/45R20 tire size, there are approximately 693 revolutions per mile (432 revolutions per kilometer). This parameter directly affects fuel consumption, tire wear, traction, and the vehicle’s speedometer accuracy.

What Is the 255/45R20 Rims Size?

The 255/45R20 tire size the rim diameter is 20 inches (508 mm). The tire is approved for rim widths between 8.0 and 9.5 inches (203.2 – 241.3 mm), providing a broad range of options for different driving conditions and performance requirements.

Fitment Guide
This table will guide you on which vehicle models the 255/45R20 tire size is commonly used on. Check your vehicle’s owner’s manual or consult a tire professional before purchasing.

Brand NameModel
ACURAMDX (2001 – 2013), RDX (2013 – 2023), ZDX (2009 – 2013)
ALFA ROMEOStelvio (2017 – 2022)
AUDIQ4 e-tron (2021 – 2023), Q4 Sportback e-tron (2021 – 2023), Q5 (2008 – 2023), Q5 Sportback (2021 – 2023), Q5L (2018 – 2023), Q5L Sportback (2021 – 2023), SQ5 (2012 – 2023), SQ5 Sportback (2021 – 2023)
BMW7 Series (2022 – 2023), i7 (2022 – 2023), X3 M (2019 – 2023), X4 M (2019 – 2023)
BMW ALPINAXD3 (2018 – 2023), XD4 (2018 – 2023)
CHRYSLER300 (2004 – 2023), 300C SRT-8 (2004 – 2014), Grand Caravan (2021 – 2023), Pacifica (2016 – 2023), Voyager (2020 – 2022)
DAEWOOKorando (1999 – 2001)
DODGEChallenger (2008 – 2023), Challenger SRT (2008 – 2014), Charger (2011 – 2023), Charger SRT (2007 – 2010), Dakota (1997 – 2002), Durango (1997 – 2003), Grand Caravan (2008 – 2010)
DONGFENGVoyah (Lantu) Free (2021 – 2023)
EVOLUTEi-JET (2022 – 2023)
FAWHongqi HS5 (2019 – 2023), Hongqi HS7 (2019 – 2022)
FAW AUDIQ5 (2018 – 2020)
FORDEdge (2006 – 2021), Evos (2021 – 2023), Flex (2008 – 2019)
GACGS8S (2020 – 2021), GS8 (2016 – 2022)
GENESISGV60 (2021 – 2023), GV70 (2020 – 2023)
HAVALH6 (2017 – 2021), H7 (2016 – 2021), H7L (2016 – 2019), H8 (2015 – 2019)
HONDACR-V (2012 – 2018), Pilot (2003 – 2015)
HYUNDAIIONIQ 5 (2021 – 2023), Santa Fe (2012 – 2023), Santa Fe Sport (2013 – 2018), Santa Fe XL (2018 – 2019), Tucson (2020 – 2023)
INFINITIQX50 (2018 – 2023), QX55 (2021 – 2023)
JEEPGrand Cherokee (2006 – 2010)
JETOURX70 (2018 – 2021), X70 Coupe (2020 – 2021), X90 (2019 – 2021), X90 Plus (2021 – 2021), X95 (2020 – 2021)
KIAEV6 (2021 – 2023), Sorento (2012 – 2023), Sorento L (2015 – 2019), Sorento Prime (2015 – 2020), Sportage (2021 – 2023)
LAND ROVERFreelander 2 (2010 – 2014), LR2 (2007 – 2015), Range Rover Sport (2005 – 2009)
LEXUSRX (2009 – 2015), RZ (2023 – 2023)
LINCOLNMKT (2009 – 2019)
MASERATIGrecale (2022 – 2023)
MAZDACX-60 (2022 – 2023)
MERCEDES-BENZEQC (2019 – 2023), EQS (2021 – 2023), GLC-Class (2015 – 2023), GLC-Class AMG (2017 – 2023), GLC-Class Coupe (2016 – 2023), GLC-Class Coupe AMG (2016 – 2023)
MERCURYMarauder (2003 – 2004)
MITSUBISHIOutlander (2021 – 2023)
NISSANAriya (2020 – 2023), X-Trail (2021 – 2023)
PORSCHECayenne (2002 – 2010)
HONGQIHS5 (2019 – 2023), HS7 (2019 – 2022)
RENAULTEspace (2015 – 2022)
ROLLS-ROYCEDawn (2015 – 2022), Ghost (2009 – 2020), Wraith (2013 – 2022)
SAAB9-7x (2005 – 2009)
SERESSF5 (2019 – 2023)
SKODAEnyaq iV (2020 – 2023)
SUBARUB9 Tribeca (2005 – 2007), Tribeca (2008 – 2014)
TESLAModel X (2015 – 2021)
VOLKSWAGENID.4 (2020 – 2023), ID.4 CROZZ (2021 – 2023), ID.4 X (2021 – 2023), ID.5 (2022 – 2023), ID.6 CROZZ (2021 – 2023), ID.6 X (2021 – 2023)
VOLVOC40 (2023 – 2024), XC60 (2008 – 2023), XC90 (2003 – 2014)
WEYVV5 (2017 – 2021), VV6 (2018 – 2021)
XPENGG6 (2023 – 2023)

Replacement Tire Size
Replacement tires must be within 3% of the total diameter of the original equipment tires to maintain similar performance characteristics and avoid potential mechanical issues.

Tire SizeOverall DiameterDifference
345/30R2028.2″-3.00%
265/40R2028.3″-2.40%
235/45R2028.3″-2.40%
305/35R2028.4″-2.20%
245/45R2028.7″-1.40%
315/35R2028.7″-1.40%
275/40R2028.7″-1.40%
285/40R2029.0″-0.30%
145/80R2029.1″0.30%
235/50R2029.3″0.80%
295/40R2029.3″0.80%
265/45R2029.4″1.10%
305/40R2029.6″1.90%
245/50R2029.7″2.20%
275/45R2029.8″2.40%

Our Observation
The 255/45R20 tire size provides a good compromise between comfort, handling, and durability. However, it’s crucial to remember that while the size fits a range of vehicles, the optimal tire choice depends on your specific driving conditions and vehicle characteristics.

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