What is the diameter of a P235/50R18 tire?

A P235/50R18 tire has an overall diameter of 27.25 inches (692.1mm).

How many revolutions per mile does a P235/50R18 tire make?

A P235/50R18 tire makes approximately 740 revolutions per mile.

What rim width is recommended for P235/50R18 tires?

The recommended wheel rim width for a P235/50R18 tire is 5.9" - 8.2".

P235/50R18

Passenger / P-Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The P235/50R18 tire size features an overall diameter of 27.25 inches, a section width of 9.3 inches (235mm), and rotates 740 times per mile. It is a standard factory tire fitment on 150+ vehicle models including Buick LaCrosse.

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Physical Dimensions & Specs

Overall Diameter

27.25"

692.1 mm

Section Width

235 mm

9.25" wide

Sidewall Height

4.63"

117.6 mm (50% aspect)

Revolutions / Mile

740

Circumference: 85.61"

Rim Diameter

18"

Wheel size

Recommended Rim Width

5.9" - 8.2"

Optimal rim width range

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Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare P235/50R18 against any proposed tire size below:

Popular Comparisons:

Tire 1 (Stock / Base)235/50R18

Section Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Wheel Width (in)

Offset ET (mm)

Overall Height:27.3"

Sidewall:4.6"

Revs/Mile:740

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

+8.5%At 60 mph reading, actual speed is 65.1 mph

Indicated	Actual Speed	Diff
20 mph	21.7 mph	+1.7 mph
30 mph	32.6 mph	+2.6 mph
45 mph	48.8 mph	+3.8 mph
60 mph	65.1 mph	+5.1 mph
75 mph	81.4 mph	+6.4 mph
90 mph	97.7 mph	+7.7 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:+1.16" ground clearance

Vehicles That Fit P235/50R18 (150+ Models)

Factory standard and optional vehicle fitments utilizing P235/50R18 tires:

Year	Make & Model	Trim / Variant	Lookup Specs
2008	Buick LaCrosse	Super	View 2008 LaCrosse ›
2009	Buick LaCrosse	Super	View 2009 LaCrosse ›
2010	Buick LaCrosse	CXL, FWD	View 2010 LaCrosse ›
2010	Buick LaCrosse	CXL, AWD	View 2010 LaCrosse ›
2010	Buick LaCrosse	CXS	View 2010 LaCrosse ›
2011	Buick LaCrosse	CXL, 2.4 C	View 2011 LaCrosse ›
2011	Buick LaCrosse	CXL, 3.6 D, FWD	View 2011 LaCrosse ›
2011	Buick LaCrosse	CXL, 3.6 D, AWD	View 2011 LaCrosse ›
2011	Buick LaCrosse	CXS	View 2011 LaCrosse ›
2011	Buick Regal	CXL	View 2011 Regal ›
2012	Buick Regal	Base	View 2012 Regal ›
2013	Buick Regal	Hybrid	View 2013 Regal ›
2013	Buick Regal	Hybrid Premium	View 2013 Regal ›
2014	Buick LaCrosse	Base, 3.6L Eng VIN 3, AWD	View 2014 LaCrosse ›
2014	Buick LaCrosse	Leather, 3.6L Eng VIN 3, FWD	View 2014 LaCrosse ›
2014	Buick LaCrosse	Leather, 3.6L Eng VIN 3, AWD	View 2014 LaCrosse ›
2014	Buick LaCrosse	Base, 3.6L Eng VIN 3, FWD	View 2014 LaCrosse ›
2014	Buick Regal	Base, 2.0L Eng VIN X, AWD	View 2014 Regal ›
2014	Buick Regal	Base, 2.0L Eng VIN X, FWD	View 2014 Regal ›
2014	Buick Regal	Premium, 2.0L Eng VIN X, AWD	View 2014 Regal ›
2014	Buick Regal	Base, 2.4L Eng VIN R	View 2014 Regal ›
2014	Buick Regal	Premium, 2.4L Eng VIN R	View 2014 Regal ›
2014	Buick Regal	Premium, 2.4L Eng VIN K	View 2014 Regal ›
2014	Buick Regal	Premium, 2.0L Eng VIN X, FWD	View 2014 Regal ›
2015	Buick LaCrosse	Base, 3.6L Eng VIN 3, Gas/Ethanol	View 2015 LaCrosse ›
2015	Buick LaCrosse	Premium, AWD, Gas	View 2015 LaCrosse ›
2015	Buick LaCrosse	Leather, 3.6L Eng VIN 3, AWD, Gas/Ethanol	View 2015 LaCrosse ›
2015	Buick LaCrosse	Leather, 3.6L Eng VIN 3, FWD, Gas/Ethanol	View 2015 LaCrosse ›
2015	Buick LaCrosse	Leather, 3.6L Eng VIN 3, FWD, Gas	View 2015 LaCrosse ›
2015	Buick LaCrosse	Leather, 3.6L Eng VIN 3, AWD, Gas	View 2015 LaCrosse ›
2015	Buick LaCrosse	Premium, AWD, Gas/Ethanol	View 2015 LaCrosse ›
2015	Buick LaCrosse	Premium, FWD, Gas	View 2015 LaCrosse ›
2015	Buick LaCrosse	Premium, FWD, Gas/Ethanol	View 2015 LaCrosse ›
2015	Buick Regal	Base, 2.0L Eng VIN X, AWD	View 2015 Regal ›
2015	Buick Regal	Base, 2.0L Eng VIN X, FWD, Trans Mfr CD 6T70/M7W	View 2015 Regal ›
2015	Buick Regal	Base, 2.0L Eng VIN X, FWD, Trans Mfr CD 6T70	View 2015 Regal ›
2015	Buick Regal	Base, 2.4L Eng VIN K	View 2015 Regal ›
2015	Buick Regal	Premium, 2.0L Eng VIN X, AWD	View 2015 Regal ›
2015	Buick Regal	Premium, 2.0L Eng VIN X, FWD	View 2015 Regal ›
2015	Buick Regal	Premium, 2.4L Eng VIN R	View 2015 Regal ›
2016	Buick LaCrosse	Base, 3.6L Eng VIN 3, Gas	View 2016 LaCrosse ›
2016	Buick LaCrosse	Leather, 3.6L Eng VIN 3, AWD, Gas/Ethanol	View 2016 LaCrosse ›
2016	Buick LaCrosse	Base, 3.6L Eng VIN 3, Gas/Ethanol	View 2016 LaCrosse ›
2016	Buick LaCrosse	Leather, 3.6L Eng VIN 3, AWD, Gas	View 2016 LaCrosse ›
2016	Buick LaCrosse	Leather, 3.6L Eng VIN 3, FWD, Gas	View 2016 LaCrosse ›
2016	Buick LaCrosse	Premium, AWD, Gas	View 2016 LaCrosse ›
2016	Buick LaCrosse	Leather, 3.6L Eng VIN 3, FWD, Gas/Ethanol	View 2016 LaCrosse ›
2016	Buick LaCrosse	Premium, AWD, Gas/Ethanol	View 2016 LaCrosse ›
2016	Buick LaCrosse	Premium, FWD, Gas	View 2016 LaCrosse ›
2016	Buick LaCrosse	Premium, FWD, Gas/Ethanol	View 2016 LaCrosse ›
2016	Buick LaCrosse	Sport Touring, Gas	View 2016 LaCrosse ›
2016	Buick LaCrosse	Sport Touring, Gas/Ethanol	View 2016 LaCrosse ›
2016	Buick Regal	Base, 2.0L Eng VIN X, AWD	View 2016 Regal ›
2016	Buick Regal	Base, 2.0L Eng VIN X, FWD	View 2016 Regal ›
2016	Buick Regal	Base, 2.4L Eng VIN K, Gas	View 2016 Regal ›
2016	Buick Regal	Base, 2.4L Eng VIN K, Gas/Ethanol	View 2016 Regal ›
2016	Buick Regal	Premium, 2.0L Eng VIN X, AWD	View 2016 Regal ›
2016	Buick Regal	Premium, 2.0L Eng VIN X, FWD	View 2016 Regal ›
2016	Buick Regal	Premium, 2.4L Eng VIN R	View 2016 Regal ›
2016	Buick Regal	Sport Touring	View 2016 Regal ›
2017	Buick Regal	Base, 2.0L Eng VIN X	View 2017 Regal ›
2017	Buick Regal	Base, 2.4L Eng VIN K, Gas	View 2017 Regal ›
2017	Buick Regal	Base, 2.4L Eng VIN K, Gas/Ethanol	View 2017 Regal ›
2017	Buick Regal	Premium, AWD	View 2017 Regal ›
2017	Buick Regal	Premium, FWD	View 2017 Regal ›
2017	Buick Regal	Sport Touring	View 2017 Regal ›
2004	Cadillac XLR	XLR	View 2004 XLR ›
2005	Cadillac STS	4.6 A, AWD	View 2005 STS ›
2005	Cadillac STS	4.6 A, RWD	View 2005 STS ›
2005	Cadillac XLR	XLR	View 2005 XLR ›
2006	Cadillac STS	Base, 4.6 A, AWD	View 2006 STS ›
2006	Cadillac STS	Base, 4.6 A, RWD	View 2006 STS ›
2006	Cadillac XLR	Base	View 2006 XLR ›
2007	Cadillac STS	Base, 4.6 A, AWD	View 2007 STS ›
2007	Cadillac STS	Base, 4.6 A, RWD	View 2007 STS ›
2007	Cadillac XLR	Base	View 2007 XLR ›
2008	Cadillac CTS	3.6 7, RWD, Automatic	View 2008 CTS ›
2008	Cadillac CTS	3.6 7, AWD	View 2008 CTS ›
2008	Cadillac CTS	3.6 7, RWD, Standard	View 2008 CTS ›
2008	Cadillac CTS	3.6 V, RWD, Automatic	View 2008 CTS ›
2008	Cadillac CTS	3.6 V, AWD	View 2008 CTS ›
2008	Cadillac CTS	3.6 V, RWD, Standard	View 2008 CTS ›
2008	Cadillac STS	Base, 3.6 V, AWD	View 2008 STS ›
2008	Cadillac STS	Base, 3.6 V, RWD	View 2008 STS ›
2008	Cadillac STS	Base, 4.6 A, AWD	View 2008 STS ›
2008	Cadillac STS	Base, 4.6 A, RWD	View 2008 STS ›
2008	Cadillac XLR	Base	View 2008 XLR ›
2009	Cadillac CTS	Base, 3.6 7, AWD	View 2009 CTS ›
2009	Cadillac CTS	Base, 3.6 7, RWD, Standard	View 2009 CTS ›
2009	Cadillac CTS	Base, 3.6 V, AWD	View 2009 CTS ›
2009	Cadillac CTS	Base, 3.6 V, RWD, Automatic	View 2009 CTS ›
2009	Cadillac CTS	Base, 3.6 V, RWD, Standard	View 2009 CTS ›
2009	Cadillac CTS	Base, 3.6 7, RWD, Automatic	View 2009 CTS ›
2009	Cadillac STS	Base, 3.6 V, AWD	View 2009 STS ›
2009	Cadillac STS	Base, 4.6 A, AWD	View 2009 STS ›
2009	Cadillac STS	Base, 3.6 V, RWD	View 2009 STS ›
2009	Cadillac STS	Base, 4.6 A, RWD	View 2009 STS ›
2009	Cadillac XLR	Base	View 2009 XLR ›
2010	Cadillac CTS	Base, 4D Sedan, 3.6 V, RWD, Standard	View 2010 CTS ›
2010	Cadillac CTS	Base, 4D Sedan, 3.6 V, AWD	View 2010 CTS ›
2010	Cadillac CTS	Base, 4D Sedan, 3.6 V, RWD, Automatic	View 2010 CTS ›
2010	Cadillac CTS	Base, 4D Sedan, 3.0 G, RWD, Automatic	View 2010 CTS ›
2010	Cadillac CTS	Base, 4D Sedan, 3.0 G, AWD	View 2010 CTS ›
2010	Cadillac CTS	Base, 4D Sedan, 3.0 G, RWD, Standard	View 2010 CTS ›
2010	Cadillac CTS	Base, 4D Wagon, 3.6 V, AWD	View 2010 CTS ›
2010	Cadillac CTS	Base, 4D Wagon, 3.0 G, RWD	View 2010 CTS ›
2010	Cadillac CTS	Base, 4D Wagon, 3.0 G, AWD	View 2010 CTS ›
2010	Cadillac CTS	Base, 4D Wagon, 3.6 V, RWD	View 2010 CTS ›
2010	Cadillac STS	3.6 V, RWD	View 2010 STS ›
2010	Cadillac STS	4.6 A, AWD	View 2010 STS ›
2010	Cadillac STS	4.6 A, RWD	View 2010 STS ›
2011	Cadillac CTS	Base, 2D Coupe, AWD	View 2011 CTS ›
2011	Cadillac CTS	Base, 2D Coupe, RWD, Automatic	View 2011 CTS ›
2011	Cadillac CTS	Base, 2D Coupe, RWD, Standard	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Sedan, 3.0 Y, AWD	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Wagon, 3.0 Y, AWD	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Sedan, 3.6 D, RWD, Standard	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Sedan, 3.6 D, RWD, Automatic	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Sedan, 3.0 Y, RWD, Standard	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Wagon, 3.0 Y, RWD	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Sedan, 3.0 Y, RWD, Automatic	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Sedan, 3.6 D, AWD	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Wagon, 3.6 D, RWD	View 2011 CTS ›
2011	Cadillac CTS	Base, 4D Wagon, 3.6 D, AWD	View 2011 CTS ›
2011	Cadillac STS	RWD	View 2011 STS ›
2012	Cadillac CTS	Base, 2D Coupe, AWD	View 2012 CTS ›
2012	Cadillac CTS	Base, 2D Coupe, RWD	View 2012 CTS ›
2012	Cadillac CTS	Base, 4D Sedan, 3.6L Eng VIN 3, AWD	View 2012 CTS ›
2012	Cadillac CTS	Base, 4D Sedan, 3.6L Eng VIN 3, RWD, Automatic Trans	View 2012 CTS ›
2012	Cadillac CTS	Base, 4D Wagon, 3.6L Eng VIN 3, AWD	View 2012 CTS ›
2012	Cadillac CTS	Base, 4D Sedan, 3.6L Eng VIN 3, RWD, Standard Trans	View 2012 CTS ›
2012	Cadillac CTS	Base, 4D Wagon, 3.6L Eng VIN 3, RWD	View 2012 CTS ›
2013	Cadillac CTS	Base, 2D Coupe, RWD	View 2013 CTS ›
2013	Cadillac CTS	Base, 2D Coupe, AWD	View 2013 CTS ›
2013	Cadillac CTS	Base, 4D Wagon, 3.6L Eng VIN 3, AWD	View 2013 CTS ›
2013	Cadillac CTS	Base, 4D Wagon, 3.6L Eng VIN 3, RWD	View 2013 CTS ›
2013	Cadillac CTS	Base, 4D Sedan, 3.6L Eng VIN 3, RWD	View 2013 CTS ›
2013	Cadillac CTS	Base, 4D Sedan, 3.6L Eng VIN 3, AWD	View 2013 CTS ›
2014	Cadillac CTS	Base, 2D Coupe, RWD	View 2014 CTS ›
2014	Cadillac CTS	Base, 2D Coupe, AWD	View 2014 CTS ›
2014	Cadillac CTS	Performance, 2D Coupe, AWD	View 2014 CTS ›
2014	Cadillac CTS	Performance, 2D Coupe, RWD	View 2014 CTS ›
2014	Cadillac CTS	Premium, 2D Coupe, AWD	View 2014 CTS ›
2014	Cadillac CTS	Premium, 2D Coupe, RWD	View 2014 CTS ›
2006	Chevrolet Colorado	2D Pickup, 2.8 8, RWD, Automatic	View 2006 Colorado ›
2006	Chevrolet Colorado	2D Pickup, 2.8 8, RWD, Standard	View 2006 Colorado ›
2006	Chevrolet Colorado	2D Pickup, 3.5 6, 4WD, Automatic	View 2006 Colorado ›
2006	Chevrolet Colorado	2D Pickup, 3.5 6, 4WD, Standard	View 2006 Colorado ›
2006	Chevrolet Colorado	4D Pickup Extra Cab, 2.8 8, RWD, Automatic	View 2006 Colorado ›
2006	Chevrolet Colorado	4D Pickup Extra Cab, 2.8 8, RWD, Standard	View 2006 Colorado ›