What is the diameter of a 215/45R18 tire?

A 215/45R18 tire has an overall diameter of 25.62 inches (650.7mm).

How many revolutions per mile does a 215/45R18 tire make?

A 215/45R18 tire makes approximately 787 revolutions per mile.

What rim width is recommended for 215/45R18 tires?

The recommended wheel rim width for a 215/45R18 tire is 5.4" - 7.5".

215/45R18

Standard Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The 215/45R18 tire size features an overall diameter of 25.62 inches, a section width of 8.5 inches (215mm), and rotates 787 times per mile. It is a standard factory tire fitment on 150+ vehicle models including Chevrolet Cobalt.

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Physical Dimensions & Specs

Overall Diameter

25.62"

650.7 mm

Section Width

215 mm

8.46" wide

Sidewall Height

3.81"

96.8 mm (45% aspect)

Revolutions / Mile

787

Circumference: 80.48"

Rim Diameter

18"

Wheel size

Recommended Rim Width

5.4" - 7.5"

Optimal rim width range

Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare 215/45R18 against any proposed tire size below:

Popular Comparisons:

Tire 1 (Stock / Base)215/45R18

Section Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Wheel Width (in)

Offset ET (mm)

Overall Height:25.6"

Sidewall:3.8"

Revs/Mile:787

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

+15.4%At 60 mph reading, actual speed is 69.3 mph

Indicated	Actual Speed	Diff
20 mph	23.1 mph	+3.1 mph
30 mph	34.6 mph	+4.6 mph
45 mph	52.0 mph	+7.0 mph
60 mph	69.3 mph	+9.3 mph
75 mph	86.6 mph	+11.6 mph
90 mph	103.9 mph	+13.9 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:+1.98" ground clearance

Vehicles That Fit 215/45R18 (150+ Models)

Factory standard and optional vehicle fitments utilizing 215/45R18 tires:

Year	Make & Model	Trim / Variant	Lookup Specs
2005	Chevrolet Cobalt	SS	View 2005 Cobalt ›
2006	Chevrolet Cobalt	SS, 2D Coupe, 2.0 P	View 2006 Cobalt ›
2006	Chevrolet Cobalt	SS, 2D Coupe, 2.4 B, Automatic	View 2006 Cobalt ›
2006	Chevrolet Cobalt	SS, 2D Coupe, 2.4 B, Standard	View 2006 Cobalt ›
2006	Chevrolet Cobalt	SS, 4D Sedan, Automatic	View 2006 Cobalt ›
2006	Chevrolet Cobalt	SS, 4D Sedan, Standard	View 2006 Cobalt ›
2007	Chevrolet Cobalt	SS, 2D Coupe, 2.0 P	View 2007 Cobalt ›
2007	Chevrolet Cobalt	SS, 2D Coupe, 2.4 B, Automatic	View 2007 Cobalt ›
2007	Chevrolet Cobalt	SS, 2D Coupe, 2.4 B, Standard	View 2007 Cobalt ›
2007	Chevrolet Cobalt	SS, 4D Sedan, Automatic	View 2007 Cobalt ›
2007	Chevrolet Cobalt	SS, 4D Sedan, Standard	View 2007 Cobalt ›
2014	Chevrolet Sonic	LTZ, 4D Hatchback, 1.4L Eng VIN B, Automatic Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Hatchback, 1.4L Eng VIN B, Standard Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Hatchback, 1.8L Eng VIN G, Automatic Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Hatchback, 1.8L Eng VIN G, Standard Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Hatchback, 1.8L Eng VIN H, Automatic Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Hatchback, 1.8L Eng VIN H, Standard Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Sedan, 1.4L Eng VIN B, Automatic Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Sedan, 1.4L Eng VIN B, Standard Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Sedan, 1.8L Eng VIN G, Automatic Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Sedan, 1.8L Eng VIN G, Standard Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Sedan, 1.8L Eng VIN H, Automatic Trans	View 2014 Sonic ›
2014	Chevrolet Sonic	LTZ, 4D Sedan, 1.8L Eng VIN H, Standard Trans	View 2014 Sonic ›
2015	Chevrolet Sonic	LTZ, 4D Hatchback, Automatic Trans	View 2015 Sonic ›
2015	Chevrolet Sonic	LTZ, 4D Hatchback, Standard Trans	View 2015 Sonic ›
2015	Chevrolet Sonic	LTZ, 4D Sedan, Automatic Trans	View 2015 Sonic ›
2015	Chevrolet Sonic	LTZ, 4D Sedan, Standard Trans	View 2015 Sonic ›
2016	Chevrolet Sonic	LTZ, 4D Hatchback	View 2016 Sonic ›
2016	Chevrolet Sonic	LTZ, 4D Sedan	View 2016 Sonic ›
2006	Mazda 6	Mazdaspeed	View 2006 6 ›
2007	Mazda 3	Mazdaspeed, 2.3 M	View 2007 3 ›
2007	Mazda 3	Mazdaspeed, 2.3 L	View 2007 3 ›
2007	Mazda 6	Mazdaspeed	View 2007 6 ›
2007	Mazda 6	s, 4D Hatchback, Automatic	View 2007 6 ›
2007	Mazda 6	s, 4D Hatchback, Standard	View 2007 6 ›
2007	Mazda 6	s, 4D Sedan, Automatic	View 2007 6 ›
2007	Mazda 6	s, 4D Sedan, Standard	View 2007 6 ›
2007	Mazda 6	s, 4D Wagon, Standard	View 2007 6 ›
2007	Mazda 6	s, 4D Wagon, Automatic	View 2007 6 ›
2008	Mazda 3	Mazdaspeed, 2.3 L	View 2008 3 ›
2008	Mazda 3	Mazdaspeed, 2.3 M	View 2008 3 ›
2008	Mazda 6	s Grand Touring, 4D Hatchback, Automatic	View 2008 6 ›
2008	Mazda 6	s Grand Touring, 4D Hatchback, Standard	View 2008 6 ›
2008	Mazda 6	s Grand Touring, 4D Sedan, Automatic	View 2008 6 ›
2008	Mazda 6	s Grand Touring, 4D Sedan, Standard	View 2008 6 ›
2008	Mazda 6	s Sport, 4D Hatchback, Automatic	View 2008 6 ›
2008	Mazda 6	s Sport, 4D Hatchback, Standard	View 2008 6 ›
2008	Mazda 6	s Sport, 4D Sedan, Automatic	View 2008 6 ›
2008	Mazda 6	s Sport, 4D Sedan, Standard	View 2008 6 ›
2008	Mazda 6	s Touring, 4D Hatchback, Automatic	View 2008 6 ›
2008	Mazda 6	s Touring, 4D Hatchback, Standard	View 2008 6 ›
2008	Mazda 6	s Touring, 4D Sedan, Automatic	View 2008 6 ›
2008	Mazda 6	s Touring, 4D Sedan, Standard	View 2008 6 ›
2009	Mazda 3	Mazdaspeed, 2.3 L	View 2009 3 ›
2009	Mazda 3	Mazdaspeed, 2.3 M	View 2009 3 ›
2014	Mazda 3	Touring, 4D Hatchback, 2.5L Eng VIN 3	View 2014 3 ›
2014	Mazda 3	Grand Touring, 4D Sedan, 2.5L Eng VIN 3	View 2014 3 ›
2014	Mazda 3	Grand Touring, 4D Hatchback, 2.5L Eng VIN 3	View 2014 3 ›
2014	Mazda 3	Touring, 4D Sedan, 2.5L Eng VIN 3	View 2014 3 ›
2015	Mazda 3	Grand Touring, 4D Hatchback, 2.5L Eng VIN 3, Automatic Trans	View 2015 3 ›
2015	Mazda 3	Grand Touring, 4D Hatchback, 2.5L Eng VIN 3, Standard Trans	View 2015 3 ›
2015	Mazda 3	Grand Touring, 4D Sedan, 2.5L Eng VIN 3, Automatic Trans	View 2015 3 ›
2015	Mazda 3	Touring, 4D Sedan, 2.5L Eng VIN 3, Standard Trans	View 2015 3 ›
2015	Mazda 3	Touring, 4D Sedan, 2.5L Eng VIN 3, Automatic Trans	View 2015 3 ›
2015	Mazda 3	Touring, 4D Hatchback, 2.5L Eng VIN 3, Standard Trans	View 2015 3 ›
2015	Mazda 3	Touring, 4D Hatchback, 2.5L Eng VIN 3, Automatic Trans	View 2015 3 ›
2015	Mazda 3	Grand Touring, 4D Sedan, 2.5L Eng VIN 3, Standard Trans	View 2015 3 ›
2016	Mazda 3	Grand Touring, 4D Hatchback, 2.5L Eng VIN 3, Standard Trans	View 2016 3 ›
2016	Mazda 3	Grand Touring, 4D Sedan, 2.5L Eng VIN 3, Standard Trans	View 2016 3 ›
2016	Mazda 3	Grand Touring, 4D Hatchback, 2.5L Eng VIN 3, Automatic Trans	View 2016 3 ›
2016	Mazda 3	Grand Touring, 4D Sedan, 2.5L Eng VIN 3, Automatic Trans	View 2016 3 ›
2016	Mazda 3	Touring, 4D Hatchback, 2.5L Eng VIN 3, Standard Trans	View 2016 3 ›
2016	Mazda 3	Touring, 4D Hatchback, 2.5L Eng VIN 3, Automatic Trans	View 2016 3 ›
2016	Mazda 3	Touring, 4D Sedan, 2.5L Eng VIN 3, Automatic Trans	View 2016 3 ›
2016	Mazda 3	Touring, 4D Sedan, 2.5L Eng VIN 3, Standard Trans	View 2016 3 ›
2017	Mazda 3	Grand Touring, 4D Hatchback, Automatic Trans	View 2017 3 ›
2017	Mazda 3	Grand Touring, 4D Hatchback, Standard Trans	View 2017 3 ›
2017	Mazda 3	Grand Touring, 4D Sedan, Automatic Trans	View 2017 3 ›
2017	Mazda 3	Grand Touring, 4D Sedan, Standard Trans	View 2017 3 ›
2017	Mazda 3	Touring, 4D Hatchback, 2.0L Eng VIN 7	View 2017 3 ›
2017	Mazda 3	Touring, 4D Hatchback, 2.5L Eng VIN 3, Automatic Trans	View 2017 3 ›
2017	Mazda 3	Touring, 4D Sedan, 2.5L Eng VIN 3, Automatic Trans	View 2017 3 ›
2017	Mazda 3	Touring, 4D Sedan, 2.5L Eng VIN 3, Standard Trans	View 2017 3 ›
2017	Mazda 3	Touring, 4D Hatchback, 2.5L Eng VIN 3, Standard Trans	View 2017 3 ›
2017	Mazda 3	Touring, 4D Sedan, 2.0L Eng VIN 7, Automatic Trans	View 2017 3 ›
2017	Mazda 3	Touring, 4D Sedan, 2.0L Eng VIN 7, Standard Trans	View 2017 3 ›
2018	Mazda 3	Grand Touring, 4D Hatchback, Automatic Trans	View 2018 3 ›
2018	Mazda 3	Grand Touring, 4D Hatchback, Standard Trans	View 2018 3 ›
2018	Mazda 3	Grand Touring, 4D Sedan, Automatic Trans	View 2018 3 ›
2018	Mazda 3	Grand Touring, 4D Sedan, Standard Trans	View 2018 3 ›
2018	Mazda 3	Touring, 4D Hatchback, Automatic Trans	View 2018 3 ›
2018	Mazda 3	Touring, 4D Hatchback, Standard Trans	View 2018 3 ›
2018	Mazda 3	Touring, 4D Sedan, Automatic Trans	View 2018 3 ›
2018	Mazda 3	Touring, 4D Sedan, Standard Trans	View 2018 3 ›
2019	Mazda 3	Base, 4D Hatchback, AWD	View 2019 3 ›
2019	Mazda 3	Base, 4D Hatchback, FWD	View 2019 3 ›
2020	Mazda 3	Base, 4D Hatchback, FWD	View 2020 3 ›
2020	Mazda 3	Base, 4D Hatchback, AWD	View 2020 3 ›
2020	Mazda 3	Preferred, 4D Hatchback, AWD	View 2020 3 ›
2020	Mazda 3	Preferred, 4D Sedan, 2.5L Eng VIN L	View 2020 3 ›
2020	Mazda 3	Preferred, 4D Hatchback, FWD	View 2020 3 ›
2020	Mazda 3	Premium, 4D Hatchback, FWD, Automatic Trans	View 2020 3 ›
2020	Mazda 3	Select, 2.5L Eng VIN M	View 2020 3 ›
2020	Mazda 3	Premium, 4D Hatchback, FWD, Standard Trans	View 2020 3 ›
2020	Mazda 3	Premium, 4D Sedan, FWD	View 2020 3 ›
2020	Mazda 3	Preferred, 4D Sedan, 2.5L Eng VIN M	View 2020 3 ›
2020	Mazda 3	Premium, 4D Hatchback, AWD	View 2020 3 ›
2020	Mazda 3	Select, 2.5L Eng VIN L	View 2020 3 ›
2020	Mazda 3	Premium, 4D Sedan, AWD	View 2020 3 ›
2021	Mazda 3	Preferred, 4D Hatchback, AWD	View 2021 3 ›
2021	Mazda 3	Preferred, 4D Hatchback, FWD	View 2021 3 ›
2021	Mazda 3	Preferred, 4D Sedan, 2.5L Eng VIN L, AWD	View 2021 3 ›
2021	Mazda 3	Preferred, 4D Sedan, 2.5L Eng VIN L, FWD	View 2021 3 ›
2021	Mazda 3	Premium, 4D Hatchback, FWD, Standard Trans	View 2021 3 ›
2021	Mazda 3	Premium, 4D Sedan, 2.5L Eng VIN L	View 2021 3 ›
2021	Mazda 3	Turbo, 4D Hatchback	View 2021 3 ›
2021	Mazda 3	Premium, 4D Hatchback, AWD	View 2021 3 ›
2021	Mazda 3	Select, 4D Sedan, 2.5L Eng VIN M, FWD	View 2021 3 ›
2021	Mazda 3	Select, 4D Sedan, 2.5L Eng VIN M, AWD	View 2021 3 ›
2021	Mazda 3	Preferred, 4D Sedan, 2.5L Eng VIN M	View 2021 3 ›
2021	Mazda 3	Select, 4D Hatchback, FWD	View 2021 3 ›
2021	Mazda 3	Premium, 4D Hatchback, FWD, Automatic Trans	View 2021 3 ›
2021	Mazda 3	Turbo Premium Plus, 4D Sedan	View 2021 3 ›
2021	Mazda 3	Select, 4D Sedan, 2.5L Eng VIN L, FWD	View 2021 3 ›
2021	Mazda 3	Turbo Premium Plus, 4D Hatchback	View 2021 3 ›
2021	Mazda 3	Select, 4D Sedan, 2.5L Eng VIN L, AWD	View 2021 3 ›
2021	Mazda 3	Turbo, 4D Sedan	View 2021 3 ›
2021	Mazda 3	Premium, 4D Sedan, 2.5L Eng VIN M, FWD	View 2021 3 ›
2021	Mazda 3	Select, 4D Hatchback, AWD	View 2021 3 ›
2021	Mazda 3	Premium, 4D Sedan, 2.5L Eng VIN M, AWD	View 2021 3 ›
2022	Mazda 3	Carbon Edition, 4D Hatchback	View 2022 3 ›
2022	Mazda 3	Carbon Edition, 4D Sedan	View 2022 3 ›
2022	Mazda 3	Preferred, 4D Hatchback, AWD	View 2022 3 ›
2022	Mazda 3	Preferred, 4D Hatchback, FWD	View 2022 3 ›
2022	Mazda 3	Preferred, 4D Sedan, AWD	View 2022 3 ›
2022	Mazda 3	Select, 4D Sedan	View 2022 3 ›
2022	Mazda 3	Premium, 4D Sedan, AWD	View 2022 3 ›
2022	Mazda 3	Premium, 4D Sedan, FWD	View 2022 3 ›
2022	Mazda 3	Preferred, 4D Sedan, FWD	View 2022 3 ›
2022	Mazda 3	Premium, 4D Hatchback, FWD, Automatic Trans	View 2022 3 ›
2022	Mazda 3	Premium, 4D Hatchback, AWD	View 2022 3 ›
2022	Mazda 3	Premium, 4D Hatchback, FWD, Standard Trans	View 2022 3 ›
2022	Mazda 3	Turbo Premium Plus, 4D Sedan	View 2022 3 ›
2022	Mazda 3	Select, 4D Hatchback	View 2022 3 ›
2022	Mazda 3	Turbo Premium Plus, 4D Hatchback	View 2022 3 ›
2022	Mazda 3	Turbo, 4D Sedan	View 2022 3 ›
2022	Mazda 3	Turbo, 4D Hatchback	View 2022 3 ›
2023	Mazda 3	Carbon Edition, 4D Hatchback, AWD	View 2023 3 ›
2023	Mazda 3	Carbon Edition, 4D Hatchback, FWD	View 2023 3 ›
2023	Mazda 3	Carbon Edition, 4D Sedan, AWD	View 2023 3 ›