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P245/40R18

Passenger / P-Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The P245/40R18 tire size features an overall diameter of 25.72 inches, a section width of 9.6 inches (245mm), and rotates 784 times per mile. It is a standard factory tire fitment on 133+ vehicle models including Audi A5.

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Physical Dimensions & Specs

Overall Diameter

25.72"

653.3 mm

Section Width

245 mm

9.65" wide

Sidewall Height

3.86"

98.0 mm (40% aspect)

Revolutions / Mile

784

Circumference: 80.79"

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 P245/40R18 against any proposed tire size below:

Popular Comparisons:
Tire 1 (Stock / Base)245/40R18
Overall Height:25.7"
Sidewall:3.9"
Revs/Mile:784
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682

Visual Tire & Wheel Comparison

Tire 125.7" HeightTire 229.6" Height

Speedometer Variance

+15.0%At 60 mph reading, actual speed is 69.0 mph
IndicatedActual SpeedDiff
20 mph23.0 mph+3.0 mph
30 mph34.5 mph+4.5 mph
45 mph51.8 mph+6.8 mph
60 mph69.0 mph+9.0 mph
75 mph86.3 mph+11.3 mph
90 mph103.5 mph+13.5 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:+1.93" ground clearance

Vehicles That Fit P245/40R18 (133+ Models)

Factory standard and optional vehicle fitments utilizing P245/40R18 tires:

YearMake & ModelTrim / VariantLookup Specs
2008Audi A5AutomaticView 2008 A5 ›
2008Audi A5StandardView 2008 A5 ›
2009Audi A5AutomaticView 2009 A5 ›
2009Audi A5StandardView 2009 A5 ›
2010Audi A52.0T Quattro, 2D Convertible, StandardView 2010 A5 ›
2010Audi A52.0T Quattro, 2D Coupe, AutomaticView 2010 A5 ›
2010Audi A52.0T Quattro, 2D Convertible, AutomaticView 2010 A5 ›
2010Audi A52.0T Quattro, 2D Coupe, StandardView 2010 A5 ›
2010Audi A52.0T, AutomaticView 2010 A5 ›
2010Audi A52.0T, StandardView 2010 A5 ›
2010Audi A53.2 QuattroView 2010 A5 ›
2011Audi A52.0TView 2011 A5 ›
2011Audi A52.0T Quattro, 2D Coupe, StandardView 2011 A5 ›
2011Audi A52.0T Quattro, 2D ConvertibleView 2011 A5 ›
2011Audi A52.0T Quattro, 2D Coupe, AutomaticView 2011 A5 ›
2012Audi A52.0TView 2012 A5 ›
2012Audi A52.0T Quattro, 2D Coupe, Standard TransView 2012 A5 ›
2012Audi A52.0T Quattro, 2D ConvertibleView 2012 A5 ›
2012Audi A52.0T Quattro, 2D Coupe, Automatic TransView 2012 A5 ›
2013Audi A5Premium Plus Quattro, 2D Convertible, Eng CD CAEBView 2013 A5 ›
2013Audi A5Premium Plus Quattro, 2D Convertible, Eng CD CPMAView 2013 A5 ›
2013Audi A5Premium Plus Quattro, 2D Coupe, Eng CD CAEB, Automatic TransView 2013 A5 ›
2013Audi A5Premium Plus Quattro, 2D Coupe, Eng CD CAEB, Standard TransView 2013 A5 ›
2013Audi A5Premium Plus Quattro, 2D Coupe, Eng CD CPMA, Automatic TransView 2013 A5 ›
2013Audi A5Premium Plus Quattro, 2D Coupe, Eng CD CPMA, Standard TransView 2013 A5 ›
2013Audi A5Premium Plus, Eng CD CAEBView 2013 A5 ›
2013Audi A5Premium Quattro, 2D Convertible, Eng CD CAEBView 2013 A5 ›
2013Audi A5Premium Quattro, 2D Convertible, Eng CD CPMAView 2013 A5 ›
2013Audi A5Premium Quattro, 2D Coupe, Eng CD CAEB, Automatic TransView 2013 A5 ›
2013Audi A5Premium Quattro, 2D Coupe, Eng CD CAEB, Standard TransView 2013 A5 ›
2013Audi A5Premium Quattro, 2D Coupe, Eng CD CPMA, Automatic TransView 2013 A5 ›
2013Audi A5Premium Quattro, 2D Coupe, Eng CD CPMA, Standard TransView 2013 A5 ›
2013Audi A5Premium, Eng CD CAEBView 2013 A5 ›
2013Audi A5Prestige Quattro, 2D Convertible, Eng CD CAEBView 2013 A5 ›
2013Audi A5Prestige Quattro, 2D Convertible, Eng CD CPMAView 2013 A5 ›
2013Audi A5Prestige Quattro, 2D Coupe, Eng CD CAEB, Automatic TransView 2013 A5 ›
2013Audi A5Prestige Quattro, 2D Coupe, Eng CD CAEB, Standard TransView 2013 A5 ›
2013Audi A5Prestige Quattro, 2D Coupe, Eng CD CPMA, Automatic TransView 2013 A5 ›
2013Audi A5Prestige Quattro, 2D Coupe, Eng CD CPMA, Standard TransView 2013 A5 ›
2013Audi A5Prestige, Eng CD CAEBView 2013 A5 ›
2014Cadillac CTSPerformance, 4D Sedan, 2.0L Eng VIN X, AWDView 2014 CTS ›
2014Cadillac CTSPerformance, 4D Sedan, 2.0L Eng VIN X, RWDView 2014 CTS ›
2014Cadillac CTSPerformance, 4D Sedan, 3.6L Eng VIN 3, AWDView 2014 CTS ›
2014Cadillac CTSPerformance, 4D Sedan, 3.6L Eng VIN 3, RWDView 2014 CTS ›
2014Cadillac CTSPremium, 4D Sedan, 2.0L Eng VIN X, AWDView 2014 CTS ›
2014Cadillac CTSPremium, 4D Sedan, 2.0L Eng VIN X, RWDView 2014 CTS ›
2014Cadillac CTSPremium, 4D Sedan, 3.6L Eng VIN 3, AWDView 2014 CTS ›
2014Cadillac CTSPremium, 4D Sedan, 3.6L Eng VIN 3, RWDView 2014 CTS ›
2015Cadillac CTSPerformance, 2.0L Eng VIN X, AWDView 2015 CTS ›
2015Cadillac CTSPerformance, 2.0L Eng VIN X, RWDView 2015 CTS ›
2015Cadillac CTSPerformance, 3.6L Eng VIN 3, AWDView 2015 CTS ›
2015Cadillac CTSPerformance, 3.6L Eng VIN 3, RWDView 2015 CTS ›
2015Cadillac CTSPremium, 2.0L Eng VIN X, AWDView 2015 CTS ›
2015Cadillac CTSPremium, 2.0L Eng VIN X, RWDView 2015 CTS ›
2015Cadillac CTSPremium, 3.6L Eng VIN 3, AWDView 2015 CTS ›
2015Cadillac CTSPremium, 3.6L Eng VIN 3, RWDView 2015 CTS ›
2016Cadillac CTSPerformance, 2.0L Eng VIN X, AWDView 2016 CTS ›
2016Cadillac CTSPerformance, 2.0L Eng VIN X, RWDView 2016 CTS ›
2016Cadillac CTSPerformance, 3.6L Eng VIN S, AWDView 2016 CTS ›
2016Cadillac CTSPerformance, 3.6L Eng VIN S, RWDView 2016 CTS ›
2016Cadillac CTSPremium, 2.0L Eng VIN X, AWDView 2016 CTS ›
2016Cadillac CTSPremium, 2.0L Eng VIN X, RWDView 2016 CTS ›
2016Cadillac CTSPremium, 3.6L Eng VIN S, AWDView 2016 CTS ›
2016Cadillac CTSPremium, 3.6L Eng VIN S, RWDView 2016 CTS ›
2017Cadillac CTSPremium Luxury, AWDView 2017 CTS ›
2017Cadillac CTSPremium Luxury, RWDView 2017 CTS ›
2018Cadillac CTSPremium Luxury, AWDView 2018 CTS ›
2018Cadillac CTSPremium Luxury, RWDView 2018 CTS ›
2019Cadillac CTSPremium Luxury, AWDView 2019 CTS ›
2019Cadillac CTSPremium Luxury, RWDView 2019 CTS ›
2005Chevrolet Corvette2D Convertible, StandardView 2005 Corvette ›
2005Chevrolet Corvette2D Convertible, AutomaticView 2005 Corvette ›
2005Chevrolet Corvette2D Coupe, AutomaticView 2005 Corvette ›
2005Chevrolet Corvette2D Coupe, StandardView 2005 Corvette ›
2006Chevrolet CorvetteBase, 2D Convertible, AutomaticView 2006 Corvette ›
2006Chevrolet CorvetteBase, 2D Convertible, StandardView 2006 Corvette ›
2006Chevrolet CorvetteBase, 2D Coupe, AutomaticView 2006 Corvette ›
2006Chevrolet CorvetteBase, 2D Coupe, StandardView 2006 Corvette ›
2007Chevrolet CorvetteBase, 2D Convertible, AutomaticView 2007 Corvette ›
2007Chevrolet CorvetteBase, 2D Convertible, StandardView 2007 Corvette ›
2007Chevrolet CorvetteBase, 2D Coupe, AutomaticView 2007 Corvette ›
2007Chevrolet CorvetteBase, 2D Coupe, StandardView 2007 Corvette ›
2008Chevrolet CorvetteBase, 2D Convertible, AutomaticView 2008 Corvette ›
2008Chevrolet CorvetteBase, 2D Convertible, StandardView 2008 Corvette ›
2008Chevrolet CorvetteBase, 2D Coupe, AutomaticView 2008 Corvette ›
2008Chevrolet CorvetteBase, 2D Coupe, StandardView 2008 Corvette ›
2008Chevrolet CorvetteZ06View 2008 Corvette ›
2009Chevrolet CorvetteBase, 2D Convertible, AutomaticView 2009 Corvette ›
2009Chevrolet CorvetteBase, 2D Convertible, StandardView 2009 Corvette ›
2009Chevrolet CorvetteBase, 2D Coupe, AutomaticView 2009 Corvette ›
2009Chevrolet CorvetteBase, 2D Coupe, StandardView 2009 Corvette ›
2010Chevrolet CorvetteBase, 2D Convertible, AutomaticView 2010 Corvette ›
2010Chevrolet CorvetteBase, 2D Convertible, StandardView 2010 Corvette ›
2010Chevrolet CorvetteBase, 2D Coupe, AutomaticView 2010 Corvette ›
2010Chevrolet CorvetteBase, 2D Coupe, StandardView 2010 Corvette ›
2011Chevrolet CorvetteBase, 2D Convertible, AutomaticView 2011 Corvette ›
2011Chevrolet CorvetteBase, 2D Convertible, StandardView 2011 Corvette ›
2011Chevrolet CorvetteBase, 2D Coupe, AutomaticView 2011 Corvette ›
2011Chevrolet CorvetteBase, 2D Coupe, StandardView 2011 Corvette ›
2012Chevrolet CorvetteBase, 2D Convertible, Automatic TransView 2012 Corvette ›
2012Chevrolet CorvetteBase, 2D Convertible, Standard Trans, Trans Mfr CD 6L85M/MM6View 2012 Corvette ›
2012Chevrolet CorvetteBase, 2D Convertible, Standard Trans, Trans Mfr CD 6L90M/MZ6View 2012 Corvette ›
2012Chevrolet CorvetteBase, 2D Coupe, Automatic TransView 2012 Corvette ›
2012Chevrolet CorvetteBase, 2D Coupe, Standard Trans, Trans Mfr CD 6L85M/MM6View 2012 Corvette ›
2012Chevrolet CorvetteBase, 2D Coupe, Standard Trans, Trans Mfr CD 6L90M/MZ6View 2012 Corvette ›
2013Chevrolet CorvetteBase, 2D Convertible, Automatic TransView 2013 Corvette ›
2013Chevrolet CorvetteBase, 2D Convertible, Standard Trans, Trans Mfr CD 6L85M/MM6View 2013 Corvette ›
2013Chevrolet CorvetteBase, 2D Convertible, Standard Trans, Trans Mfr CD 6L90M/MZ6View 2013 Corvette ›
2013Chevrolet CorvetteBase, 2D Coupe, Automatic TransView 2013 Corvette ›
2013Chevrolet CorvetteBase, 2D Coupe, Standard Trans, Trans Mfr CD 6L85M/MM6View 2013 Corvette ›
2013Chevrolet CorvetteBase, 2D Coupe, Standard Trans, Trans Mfr CD 6L90M/MZ6View 2013 Corvette ›
2014Chevrolet Corvette2D Convertible, Automatic TransView 2014 Corvette ›
2014Chevrolet Corvette2D Convertible, Standard TransView 2014 Corvette ›
2014Chevrolet Corvette2D Coupe, Automatic TransView 2014 Corvette ›
2014Chevrolet Corvette2D Coupe, Standard TransView 2014 Corvette ›
2015Chevrolet CorvetteStingray, 2D Convertible, Automatic TransView 2015 Corvette ›
2015Chevrolet CorvetteStingray, 2D Convertible, Standard TransView 2015 Corvette ›
2015Chevrolet CorvetteStingray, 2D Coupe, Automatic TransView 2015 Corvette ›
2015Chevrolet CorvetteStingray, 2D Coupe, Standard TransView 2015 Corvette ›
2016Chevrolet CorvetteStingray, 2D Convertible, Automatic TransView 2016 Corvette ›
2016Chevrolet CorvetteStingray, 2D Convertible, Standard TransView 2016 Corvette ›
2016Chevrolet CorvetteStingray, 2D Coupe, Automatic TransView 2016 Corvette ›
2016Chevrolet CorvetteStingray, 2D Coupe, Standard TransView 2016 Corvette ›
2017Chevrolet CorvetteStingray, 2D Coupe, Standard TransView 2017 Corvette ›
2017Chevrolet CorvetteStingray, 2D Coupe, Automatic TransView 2017 Corvette ›
2017Chevrolet CorvetteStingray, 2D Convertible, Automatic TransView 2017 Corvette ›
2017Chevrolet CorvetteStingray, 2D Convertible, Standard TransView 2017 Corvette ›
2007Lexus GS 450hGS 450hView 2007 GS 450h ›
2008Lexus GS 450hGS 450hView 2008 GS 450h ›
2009Lexus GS 450hGS 450hView 2009 GS 450h ›
2010Lexus GS 450hGS 450hView 2010 GS 450h ›
2011Lexus GS 450hGS 450hView 2011 GS 450h ›
2011Lexus GS 460GS 460View 2011 GS 460 ›