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245/45R18

Standard Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The 245/45R18 tire size features an overall diameter of 26.68 inches, a section width of 9.6 inches (245mm), and rotates 756 times per mile. It is a standard factory tire fitment on 150+ vehicle models including Audi S8.

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Physical Dimensions & Specs

Overall Diameter

26.68"

677.7 mm

Section Width

245 mm

9.65" wide

Sidewall Height

4.34"

110.2 mm (45% aspect)

Revolutions / Mile

756

Circumference: 83.82"

Rim Diameter

18"

Wheel size

Recommended Rim Width

6.1" - 8.6"

Optimal rim width range

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Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare 245/45R18 against any proposed tire size below:

Popular Comparisons:
Tire 1 (Stock / Base)245/45R18
Overall Height:26.7"
Sidewall:4.3"
Revs/Mile:756
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682

Visual Tire & Wheel Comparison

Tire 126.7" HeightTire 229.6" Height

Speedometer Variance

+10.8%At 60 mph reading, actual speed is 66.5 mph
IndicatedActual SpeedDiff
20 mph22.2 mph+2.2 mph
30 mph33.3 mph+3.3 mph
45 mph49.9 mph+4.9 mph
60 mph66.5 mph+6.5 mph
75 mph83.1 mph+8.1 mph
90 mph99.8 mph+9.8 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:+1.45" ground clearance

Vehicles That Fit 245/45R18 (150+ Models)

Factory standard and optional vehicle fitments utilizing 245/45R18 tires:

YearMake & ModelTrim / VariantLookup Specs
2001Audi S8S8View 2001 S8 ›
2002Audi S8S8View 2002 S8 ›
2003Audi S8S8View 2003 S8 ›
2004Audi allroad4.2 LView 2004 allroad ›
2005Audi allroad4.2 LView 2005 allroad ›
2012Audi A63.0T QuattroView 2012 A6 ›
2012Audi A62.0TView 2012 A6 ›
2013Audi A6Premium PlusView 2013 A6 ›
2013Audi A6Premium Plus Quattro, 2.0L Eng VIN FView 2013 A6 ›
2013Audi A6Premium Plus Quattro, 3.0L Eng VIN GView 2013 A6 ›
2013Audi A6Prestige QuattroView 2013 A6 ›
2013Audi allroadPremiumView 2013 allroad ›
2013Audi allroadPremium PlusView 2013 allroad ›
2013Audi allroadPrestigeView 2013 allroad ›
2014Audi A6Premium PlusView 2014 A6 ›
2014Audi A6 QuattroPremium Plus, 2.0L Eng VIN FView 2014 A6 Quattro ›
2014Audi A6 QuattroPremium Plus, 3.0L Eng VIN G, Eng CD CGXBView 2014 A6 Quattro ›
2014Audi A6 QuattroPremium Plus, 3.0L Eng VIN G, Eng CD CTUAView 2014 A6 Quattro ›
2014Audi A6 QuattroPrestige, Eng CD CTUAView 2014 A6 Quattro ›
2014Audi A6 QuattroPrestige, Eng CD CGXBView 2014 A6 Quattro ›
2014Audi A6 QuattroTDI Premium PlusView 2014 A6 Quattro ›
2014Audi A6 QuattroTDI PrestigeView 2014 A6 Quattro ›
2014Audi allroadPremiumView 2014 allroad ›
2014Audi allroadPremium PlusView 2014 allroad ›
2014Audi allroadPrestigeView 2014 allroad ›
2015Audi A6PremiumView 2015 A6 ›
2015Audi A6Premium PlusView 2015 A6 ›
2015Audi A6 QuattroPremiumView 2015 A6 Quattro ›
2015Audi A6 QuattroPremium Plus, 2.0L Eng VIN FView 2015 A6 Quattro ›
2015Audi A6 QuattroPremium Plus, 3.0L Eng VIN GView 2015 A6 Quattro ›
2015Audi A6 QuattroPrestigeView 2015 A6 Quattro ›
2015Audi A6 QuattroTDI Premium PlusView 2015 A6 Quattro ›
2015Audi A6 QuattroTDI PrestigeView 2015 A6 Quattro ›
2015Audi allroadPremium PlusView 2015 allroad ›
2015Audi allroadPremiumView 2015 allroad ›
2015Audi allroadPrestigeView 2015 allroad ›
2016Audi A6PremiumView 2016 A6 ›
2016Audi A6Premium PlusView 2016 A6 ›
2016Audi A6 QuattroPremium Plus, 2.0L Eng VIN FView 2016 A6 Quattro ›
2016Audi A6 QuattroPremium Plus, 3.0L Eng VIN GView 2016 A6 Quattro ›
2016Audi A6 QuattroPrestigeView 2016 A6 Quattro ›
2016Audi A6 QuattroTDI Premium PlusView 2016 A6 Quattro ›
2016Audi A6 QuattroTDI PrestigeView 2016 A6 Quattro ›
2016Audi allroadPremiumView 2016 allroad ›
2016Audi allroadPremium PlusView 2016 allroad ›
2017Audi A4 allroadPremium PlusView 2017 A4 allroad ›
2017Audi A4 allroadPrestigeView 2017 A4 allroad ›
2017Audi A4 allroadPremiumView 2017 A4 allroad ›
2017Audi A6PremiumView 2017 A6 ›
2017Audi A6Premium PlusView 2017 A6 ›
2017Audi A6 QuattroPremiumView 2017 A6 Quattro ›
2017Audi A6 QuattroPremium Plus, 2.0L Eng VIN 8View 2017 A6 Quattro ›
2017Audi A6 QuattroPremium Plus, 3.0L Eng VIN 2View 2017 A6 Quattro ›
2017Audi A6 QuattroPrestigeView 2017 A6 Quattro ›
2018Audi A4 allroadPremiumView 2018 A4 allroad ›
2018Audi A4 allroadPremium PlusView 2018 A4 allroad ›
2018Audi A4 allroadPrestigeView 2018 A4 allroad ›
2018Audi A6PremiumView 2018 A6 ›
2018Audi A6Premium PlusView 2018 A6 ›
2018Audi A6 QuattroPremium Plus, 2.0L Eng VIN 8View 2018 A6 Quattro ›
2018Audi A6 QuattroPremium Plus, 3.0L Eng VIN 3View 2018 A6 Quattro ›
2018Audi A6 QuattroPremium, 2.0L Eng VIN 8View 2018 A6 Quattro ›
2018Audi A6 QuattroPremium, 3.0L Eng VIN 3View 2018 A6 Quattro ›
2018Audi A6 QuattroPrestigeView 2018 A6 Quattro ›
2019Audi A4 allroadPremiumView 2019 A4 allroad ›
2019Audi A4 allroadPremium PlusView 2019 A4 allroad ›
2019Audi A4 allroadPrestigeView 2019 A4 allroad ›
2020Audi A4 allroadPremium PlusView 2020 A4 allroad ›
2020Audi A4 allroadPremiumView 2020 A4 allroad ›
2020Audi A4 allroadPrestigeView 2020 A4 allroad ›
2021Audi A4 allroadPrestigeView 2021 A4 allroad ›
2021Audi A4 allroadPremium PlusView 2021 A4 allroad ›
2021Audi A4 allroadPremiumView 2021 A4 allroad ›
2022Audi A4 allroadPrestigeView 2022 A4 allroad ›
2022Audi A4 allroadPremiumView 2022 A4 allroad ›
2022Audi A4 allroadPremium PlusView 2022 A4 allroad ›
2023Audi A4 allroadPremium PlusView 2023 A4 allroad ›
2023Audi A4 allroadPremiumView 2023 A4 allroad ›
2023Audi A4 allroadPrestigeView 2023 A4 allroad ›
2024Audi A4 allroadPremiumView 2024 A4 allroad ›
2024Audi A4 allroadPrestigeView 2024 A4 allroad ›
2024Audi A4 allroadPremium PlusView 2024 A4 allroad ›
2025Audi A4 allroadPremiumView 2025 A4 allroad ›
2025Audi A4 allroadPrestigeView 2025 A4 allroad ›
2025Audi A4 allroadPremium PlusView 2025 A4 allroad ›
2000BMW Z8Z8View 2000 Z8 ›
2001BMW Z8Z8View 2001 Z8 ›
2002BMW Z8Z8View 2002 Z8 ›
2003BMW Z8BaseView 2003 Z8 ›
2004BMW 645Ci2D Convertible, AutomaticView 2004 645Ci ›
2004BMW 645Ci2D Convertible, StandardView 2004 645Ci ›
2004BMW 645Ci2D Coupe, AutomaticView 2004 645Ci ›
2004BMW 645Ci2D Coupe, StandardView 2004 645Ci ›
2005BMW 645Ci2D Convertible, AutomaticView 2005 645Ci ›
2005BMW 645Ci2D Convertible, StandardView 2005 645Ci ›
2005BMW 645Ci2D Coupe, AutomaticView 2005 645Ci ›
2005BMW 645Ci2D Coupe, StandardView 2005 645Ci ›
2006BMW 650i2D Convertible, Standard, GS653BZView 2006 650i ›
2006BMW 650i2D Convertible, AutomaticView 2006 650i ›
2006BMW 650i2D Convertible, Standard, GS653BZ (SMG)View 2006 650i ›
2006BMW 650i2D Coupe, AutomaticView 2006 650i ›
2006BMW 650i2D Coupe, Standard, GS653BZ (SMG)View 2006 650i ›
2006BMW 650i2D Coupe, Standard, GS653BZView 2006 650i ›
2007BMW 650i2D Convertible, AutomaticView 2007 650i ›
2007BMW 650i2D Convertible, Standard, GS653BZView 2007 650i ›
2007BMW 650i2D Convertible, Standard, GS653BZ (SMG)View 2007 650i ›
2007BMW 650i2D Coupe, AutomaticView 2007 650i ›
2007BMW 650i2D Coupe, Standard, GS653BZView 2007 650i ›
2007BMW 650i2D Coupe, Standard, GS653BZ (SMG)View 2007 650i ›
2008BMW 650i2D Convertible, AutomaticView 2008 650i ›
2008BMW 650i2D Convertible, Standard, GS653BZView 2008 650i ›
2008BMW 650i2D Coupe, AutomaticView 2008 650i ›
2008BMW 650i2D Convertible, Standard, GS653BZ (SMG)View 2008 650i ›
2008BMW 650i2D Coupe, Standard, GS653BZ (SMG)View 2008 650i ›
2008BMW 650i2D Coupe, Standard, GS653BZView 2008 650i ›
2009BMW 650i2D Convertible, AutomaticView 2009 650i ›
2009BMW 650i2D Convertible, Standard, GS653BZView 2009 650i ›
2009BMW 650i2D Convertible, Standard, GS653BZ (SMG)View 2009 650i ›
2009BMW 650i2D Coupe, AutomaticView 2009 650i ›
2009BMW 650i2D Coupe, Standard, GS653BZView 2009 650i ›
2009BMW 650i2D Coupe, Standard, GS653BZ (SMG)View 2009 650i ›
2010BMW 650i2D Convertible, AutomaticView 2010 650i ›
2010BMW 650i2D Convertible, StandardView 2010 650i ›
2010BMW 650i2D Coupe, AutomaticView 2010 650i ›
2010BMW 650i2D Coupe, StandardView 2010 650i ›
2011BMW 535iAutomaticView 2011 535i ›
2011BMW 535iStandardView 2011 535i ›
2011BMW 550i4.4 C, AutomaticView 2011 550i ›
2011BMW 550i4.4 C, StandardView 2011 550i ›
2011BMW 550i4.4, N63, AutomaticView 2011 550i ›
2011BMW 550i4.4, N63B44AView 2011 550i ›
2011BMW 550i4.4, N63, StandardView 2011 550i ›
2011BMW 550xi4.4 CView 2011 550xi ›
2011BMW 550xi4.4, N63View 2011 550xi ›
2011BMW 550xi4.4, N63B44AView 2011 550xi ›
2011BMW 528i528iView 2011 528i ›
2011BMW 535xi535xiView 2011 535xi ›
2012BMW 535iAutomatic TransView 2012 535i ›
2012BMW 535iStandard TransView 2012 535i ›
2012BMW 550i4.4L Eng VIN C, Automatic TransView 2012 550i ›
2012BMW 550i4.4L Eng VIN C, Standard TransView 2012 550i ›
2012BMW 550i4.4L Eng, Eng CD N63, Automatic TransView 2012 550i ›
2012BMW 550i4.4L Eng, Eng CD N63, Standard TransView 2012 550i ›
2012BMW 550i4.4L Eng, Eng CD N63B44AView 2012 550i ›
2012BMW 550xi4.4L Eng VIN CView 2012 550xi ›
2012BMW 550xi4.4L Eng, Eng CD N63B44AView 2012 550xi ›
2012BMW 550xi4.4L Eng, Eng CD N63View 2012 550xi ›
2012BMW 640i2D ConvertibleView 2012 640i ›
2012BMW 640i2D CoupeView 2012 640i ›
2012BMW 528i528iView 2012 528i ›