What is the diameter of a 245/45R20 tire?

A 245/45R20 tire has an overall diameter of 28.68 inches (728.5mm).

How many revolutions per mile does a 245/45R20 tire make?

A 245/45R20 tire makes approximately 703 revolutions per mile.

What rim width is recommended for 245/45R20 tires?

The recommended wheel rim width for a 245/45R20 tire is 6.1" - 8.6".

245/45R20

Standard Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The 245/45R20 tire size features an overall diameter of 28.68 inches, a section width of 9.6 inches (245mm), and rotates 703 times per mile. It is a standard factory tire fitment on 150+ vehicle models including Audi A6 allroad.

Shop 245/45R20 Tires on Tire Rack →Buy on Amazon →

Physical Dimensions & Specs

Overall Diameter

28.68"

728.5 mm

Section Width

245 mm

9.65" wide

Sidewall Height

4.34"

110.2 mm (45% aspect)

Revolutions / Mile

703

Circumference: 90.1"

Rim Diameter

20"

Wheel size

Recommended Rim Width

6.1" - 8.6"

Optimal rim width range

Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare 245/45R20 against any proposed tire size below:

Popular Comparisons:

Tire 1 (Stock / Base)245/45R20

Section Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Wheel Width (in)

Offset ET (mm)

Overall Height:28.7"

Sidewall:4.3"

Revs/Mile:703

Tire 2 (New / Compare)245/60R18

Section Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Wheel Width (in)

Offset ET (mm)

Overall Height:29.6"

Sidewall:5.8"

Revs/Mile:682

Visual Tire & Wheel Comparison

Speedometer Variance

+3.1%At 60 mph reading, actual speed is 61.9 mph

Indicated	Actual Speed	Diff
20 mph	20.6 mph	+0.6 mph
30 mph	30.9 mph	+0.9 mph
45 mph	46.4 mph	+1.4 mph
60 mph	61.9 mph	+1.9 mph
75 mph	77.3 mph	+2.3 mph
90 mph	92.8 mph	+2.8 mph

Fender & Suspension Clearance

Fitment Status: MODERATE RISK

Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.

Inner Strut Space:7.7mm LESS clearance

Outer Fender Push:Extends 17.7mm further out

Ride Height Delta:+0.45" ground clearance

Vehicles That Fit 245/45R20 (150+ Models)

Factory standard and optional vehicle fitments utilizing 245/45R20 tires:

Year	Make & Model	Trim / Variant	Lookup Specs
2020	Audi A6 allroad	Premium Plus	View 2020 A6 allroad ›
2020	Audi A6 allroad	Prestige	View 2020 A6 allroad ›
2021	Audi A6 allroad	Premium Plus	View 2021 A6 allroad ›
2021	Audi A6 allroad	Prestige	View 2021 A6 allroad ›
2022	Audi A6 allroad	Premium Plus	View 2022 A6 allroad ›
2022	Audi A6 allroad	Prestige	View 2022 A6 allroad ›
2022	Audi e-tron GT	Premium Plus	View 2022 e-tron GT ›
2022	Audi e-tron GT	Prestige	View 2022 e-tron GT ›
2022	Audi RS e-tron GT	RS e-tron GT	View 2022 RS e-tron GT ›
2023	Audi A6 allroad	Premium Plus	View 2023 A6 allroad ›
2023	Audi A6 allroad	Prestige	View 2023 A6 allroad ›
2023	Audi e-tron GT	Premium Plus	View 2023 e-tron GT ›
2023	Audi e-tron GT	Prestige	View 2023 e-tron GT ›
2023	Audi RS e-tron GT	RS e-tron GT	View 2023 RS e-tron GT ›
2024	Audi A6 allroad	Prestige	View 2024 A6 allroad ›
2024	Audi A6 allroad	Premium Plus	View 2024 A6 allroad ›
2024	Audi e-tron GT	Premium Plus	View 2024 e-tron GT ›
2024	Audi e-tron GT	Prestige	View 2024 e-tron GT ›
2024	Audi RS e-tron GT	RS e-tron GT	View 2024 RS e-tron GT ›
2025	Audi A6 allroad	Prestige	View 2025 A6 allroad ›
2025	Audi A6 allroad	Premium Plus	View 2025 A6 allroad ›
2025	Audi S e-tron GT	Premium Plus	View 2025 S e-tron GT ›
2025	Audi S e-tron GT	Prestige	View 2025 S e-tron GT ›
2025	Audi RS e-tron GT	RS e-tron GT	View 2025 RS e-tron GT ›
2021	Buick Envision	Preferred, FWD	View 2021 Envision ›
2021	Buick Envision	Essence, FWD	View 2021 Envision ›
2021	Buick Envision	Essence, AWD	View 2021 Envision ›
2021	Buick Envision	Avenir, AWD	View 2021 Envision ›
2021	Buick Envision	Avenir, FWD	View 2021 Envision ›
2021	Buick Envision	Preferred, AWD	View 2021 Envision ›
2022	Buick Envision	Essence, AWD	View 2022 Envision ›
2022	Buick Envision	Preferred, FWD	View 2022 Envision ›
2022	Buick Envision	Avenir, AWD	View 2022 Envision ›
2022	Buick Envision	Avenir, FWD	View 2022 Envision ›
2022	Buick Envision	Preferred, AWD	View 2022 Envision ›
2022	Buick Envision	Essence, FWD	View 2022 Envision ›
2023	Buick Envision	Preferred, FWD	View 2023 Envision ›
2023	Buick Envision	Essence, AWD	View 2023 Envision ›
2023	Buick Envision	Essence, FWD	View 2023 Envision ›
2023	Buick Envision	Avenir, FWD	View 2023 Envision ›
2023	Buick Envision	Preferred, AWD	View 2023 Envision ›
2023	Buick Envision	Avenir, AWD	View 2023 Envision ›
2024	Buick Envision	Sport Touring	View 2024 Envision ›
2024	Buick Envision	Avenir	View 2024 Envision ›
2025	Buick Envision	Avenir	View 2025 Envision ›
2025	Buick Envision	Sport Touring	View 2025 Envision ›
2010	Chevrolet Camaro	LT, Automatic	View 2010 Camaro ›
2010	Chevrolet Camaro	LT, Standard	View 2010 Camaro ›
2010	Chevrolet Camaro	SS, 6.2 J	View 2010 Camaro ›
2010	Chevrolet Camaro	SS, 6.2 W	View 2010 Camaro ›
2011	Chevrolet Camaro	LT, 2D Convertible, Automatic	View 2011 Camaro ›
2011	Chevrolet Camaro	LT, 2D Convertible, Standard	View 2011 Camaro ›
2011	Chevrolet Camaro	LT, 2D Coupe, Automatic	View 2011 Camaro ›
2011	Chevrolet Camaro	LT, 2D Coupe, Standard	View 2011 Camaro ›
2011	Chevrolet Camaro	SS, 2D Convertible, 6.2 J	View 2011 Camaro ›
2011	Chevrolet Camaro	SS, 2D Convertible, 6.2 W	View 2011 Camaro ›
2011	Chevrolet Camaro	SS, 2D Coupe, 6.2 J	View 2011 Camaro ›
2011	Chevrolet Camaro	SS, 2D Coupe, 6.2 W	View 2011 Camaro ›
2012	Chevrolet Camaro	LT, 2D Convertible, Automatic Trans	View 2012 Camaro ›
2012	Chevrolet Camaro	SS, 2D Convertible, 6.2L Eng VIN W	View 2012 Camaro ›
2012	Chevrolet Camaro	LT, 2D Coupe, Standard Trans	View 2012 Camaro ›
2012	Chevrolet Camaro	LT, 2D Convertible, Standard Trans	View 2012 Camaro ›
2012	Chevrolet Camaro	SS, 2D Convertible, 6.2L Eng VIN J	View 2012 Camaro ›
2012	Chevrolet Camaro	LT, 2D Coupe, Automatic Trans	View 2012 Camaro ›
2012	Chevrolet Camaro	SS, 2D Coupe, 6.2L Eng VIN J	View 2012 Camaro ›
2012	Chevrolet Camaro	SS, 2D Coupe, 6.2L Eng VIN W	View 2012 Camaro ›
2013	Chevrolet Camaro	LT, 2D Convertible, Automatic Trans	View 2013 Camaro ›
2013	Chevrolet Camaro	LT, 2D Coupe, Automatic Trans	View 2013 Camaro ›
2013	Chevrolet Camaro	LT, 2D Convertible, Standard Trans	View 2013 Camaro ›
2013	Chevrolet Camaro	SS, 2D Convertible, 6.2L Eng VIN J	View 2013 Camaro ›
2013	Chevrolet Camaro	SS, 2D Convertible, 6.2L Eng VIN W	View 2013 Camaro ›
2013	Chevrolet Camaro	LT, 2D Coupe, Standard Trans	View 2013 Camaro ›
2013	Chevrolet Camaro	SS, 2D Coupe, 6.2L Eng VIN J	View 2013 Camaro ›
2013	Chevrolet Camaro	SS, 2D Coupe, 6.2L Eng VIN W, Trans Mfr CD 6L85M/MM6	View 2013 Camaro ›
2013	Chevrolet Camaro	SS, 2D Coupe, 6.2L Eng VIN W, Trans Mfr CD 6L90M/M10	View 2013 Camaro ›
2014	Chevrolet Camaro	LT, 2D Convertible, Automatic Trans	View 2014 Camaro ›
2014	Chevrolet Camaro	LT, 2D Convertible, Standard Trans	View 2014 Camaro ›
2014	Chevrolet Camaro	LT, 2D Coupe, Automatic Trans	View 2014 Camaro ›
2014	Chevrolet Camaro	LT, 2D Coupe, Standard Trans	View 2014 Camaro ›
2014	Chevrolet Camaro	SS, 2D Convertible, 6.2L Eng VIN J	View 2014 Camaro ›
2014	Chevrolet Camaro	SS, 2D Convertible, 6.2L Eng VIN W	View 2014 Camaro ›
2014	Chevrolet Camaro	SS, 2D Coupe, 6.2L Eng VIN W	View 2014 Camaro ›
2014	Chevrolet Camaro	SS, 2D Coupe, 6.2L Eng VIN J	View 2014 Camaro ›
2015	Chevrolet Camaro	LT, 2D Convertible, Automatic Trans	View 2015 Camaro ›
2015	Chevrolet Camaro	LT, 2D Coupe, Automatic Trans	View 2015 Camaro ›
2015	Chevrolet Camaro	LT, 2D Convertible, Standard Trans	View 2015 Camaro ›
2015	Chevrolet Camaro	SS, 2D Convertible, 6.2L Eng VIN J	View 2015 Camaro ›
2015	Chevrolet Camaro	LT, 2D Coupe, Standard Trans	View 2015 Camaro ›
2015	Chevrolet Camaro	SS, 2D Convertible, 6.2L Eng VIN W	View 2015 Camaro ›
2015	Chevrolet Camaro	SS, 2D Coupe, 6.2L Eng VIN W	View 2015 Camaro ›
2015	Chevrolet Camaro	SS, 2D Coupe, 6.2L Eng VIN J	View 2015 Camaro ›
2005	Chrysler 300	SRT-8	View 2005 300 ›
2006	Chrysler 300	SRT-8	View 2006 300 ›
2007	Chrysler 300	SRT-8	View 2007 300 ›
2008	Chrysler 300	SRT-8	View 2008 300 ›
2009	Chrysler 300	C, RWD	View 2009 300 ›
2009	Chrysler 300	SRT-8	View 2009 300 ›
2010	Chrysler 300	C, RWD	View 2010 300 ›
2010	Chrysler 300	S, 3.5 V	View 2010 300 ›
2010	Chrysler 300	S, 5.7 T	View 2010 300 ›
2010	Chrysler 300	SRT-8	View 2010 300 ›
2012	Chrysler 300	C Luxury, RWD	View 2012 300 ›
2012	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas	View 2012 300 ›
2012	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2012 300 ›
2012	Chrysler 300	S, 5.7L Eng VIN T, RWD	View 2012 300 ›
2012	Chrysler 300	SRT-8	View 2012 300 ›
2013	Chrysler 300	C Luxury, 3.6L Eng VIN G, Gas	View 2013 300 ›
2013	Chrysler 300	C Luxury, 3.6L Eng VIN G, Gas/Ethanol	View 2013 300 ›
2013	Chrysler 300	C Luxury, 5.7L Eng VIN T, RWD	View 2013 300 ›
2013	Chrysler 300	S, 3.6L Eng VIN G, RWD, Trans Mfr CD 845RE, Gas	View 2013 300 ›
2013	Chrysler 300	S, 3.6L Eng VIN G, RWD, Trans Mfr CD 8HP45, Gas	View 2013 300 ›
2013	Chrysler 300	S, 3.6L Eng VIN G, RWD, Trans Mfr CD 8HP45, Gas/Ethanol	View 2013 300 ›
2013	Chrysler 300	S, 3.6L Eng VIN G, RWD, Trans Mfr CD 845RE, Gas/Ethanol	View 2013 300 ›
2013	Chrysler 300	SRT-8	View 2013 300 ›
2013	Chrysler 300	S, 5.7L Eng VIN T, RWD	View 2013 300 ›
2014	Chrysler 300	C John Varvatos Luxury, 3.6L Eng VIN G, RWD, Gas	View 2014 300 ›
2014	Chrysler 300	C John Varvatos Luxury, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2014 300 ›
2014	Chrysler 300	C John Varvatos Luxury, 5.7L Eng VIN T, RWD	View 2014 300 ›
2014	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas	View 2014 300 ›
2014	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2014 300 ›
2014	Chrysler 300	S, 5.7L Eng VIN T, RWD	View 2014 300 ›
2014	Chrysler 300	SRT-8	View 2014 300 ›
2015	Chrysler 300	C Platinum, 5.7L Eng VIN T	View 2015 300 ›
2015	Chrysler 300	C Platinum, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2015 300 ›
2015	Chrysler 300	C Platinum, 3.6L Eng VIN G, RWD, Gas	View 2015 300 ›
2015	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas	View 2015 300 ›
2015	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2015 300 ›
2015	Chrysler 300	S, 5.7L Eng VIN T	View 2015 300 ›
2016	Chrysler 300	C Platinum, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2016 300 ›
2016	Chrysler 300	C Platinum, 5.7L Eng VIN T	View 2016 300 ›
2016	Chrysler 300	C Platinum, 3.6L Eng VIN G, RWD, Gas	View 2016 300 ›
2016	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2016 300 ›
2016	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas	View 2016 300 ›
2016	Chrysler 300	S, 5.7L Eng VIN T	View 2016 300 ›
2017	Chrysler 300	C Platinum, 3.6L Eng VIN G, RWD, Gas	View 2017 300 ›
2017	Chrysler 300	C Platinum, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2017 300 ›
2017	Chrysler 300	C Platinum, 5.7L Eng VIN T	View 2017 300 ›
2017	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2017 300 ›
2017	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas	View 2017 300 ›
2017	Chrysler 300	S, 5.7L Eng VIN T	View 2017 300 ›
2018	Chrysler 300	C	View 2018 300 ›
2018	Chrysler 300	Limited, RWD, Gas	View 2018 300 ›
2018	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas	View 2018 300 ›
2018	Chrysler 300	Limited, RWD, Gas/Ethanol	View 2018 300 ›
2018	Chrysler 300	S, 5.7L Eng VIN T	View 2018 300 ›
2018	Chrysler 300	Touring, RWD, Gas	View 2018 300 ›
2018	Chrysler 300	Touring, RWD, Gas/Ethanol	View 2018 300 ›
2018	Chrysler 300	S, 3.6L Eng VIN G, RWD, Gas/Ethanol	View 2018 300 ›
2019	Chrysler 300	C	View 2019 300 ›
2019	Chrysler 300	Limited, RWD, Gas	View 2019 300 ›