What is the diameter of a 225/55R18 tire?

A 225/55R18 tire has an overall diameter of 27.74 inches (704.6mm).

How many revolutions per mile does a 225/55R18 tire make?

A 225/55R18 tire makes approximately 727 revolutions per mile.

What rim width is recommended for 225/55R18 tires?

The recommended wheel rim width for a 225/55R18 tire is 5.6" - 7.9".

225/55R18

Standard Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The 225/55R18 tire size features an overall diameter of 27.74 inches, a section width of 8.9 inches (225mm), and rotates 727 times per mile. It is a standard factory tire fitment on 150+ vehicle models including Acura ADX, Alfa Romeo Tonale.

Shop 225/55R18 Tires on Tire Rack →Buy on Amazon →

Physical Dimensions & Specs

Overall Diameter

27.74"

704.6 mm

Section Width

225 mm

8.86" wide

Sidewall Height

4.87"

123.7 mm (55% aspect)

Revolutions / Mile

727

Circumference: 87.16"

Rim Diameter

18"

Wheel size

Recommended Rim Width

5.6" - 7.9"

Optimal rim width range

Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare 225/55R18 against any proposed tire size below:

Popular Comparisons:

Tire 1 (Stock / Base)225/55R18

Section Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Wheel Width (in)

Offset ET (mm)

Overall Height:27.7"

Sidewall:4.9"

Revs/Mile:727

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

+6.6%At 60 mph reading, actual speed is 64.0 mph

Indicated	Actual Speed	Diff
20 mph	21.3 mph	+1.3 mph
30 mph	32.0 mph	+2.0 mph
45 mph	48.0 mph	+3.0 mph
60 mph	64.0 mph	+4.0 mph
75 mph	79.9 mph	+4.9 mph
90 mph	95.9 mph	+5.9 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:+0.92" ground clearance

Vehicles That Fit 225/55R18 (150+ Models)

Factory standard and optional vehicle fitments utilizing 225/55R18 tires:

Year	Make & Model	Trim / Variant	Lookup Specs
2025	Acura ADX	Base, AWD	View 2025 ADX ›
2025	Acura ADX	Base, FWD	View 2025 ADX ›
2024	Alfa Romeo Tonale	Sprint	View 2024 Tonale ›
2024	Alfa Romeo Tonale	Ti	View 2024 Tonale ›
2025	Alfa Romeo Tonale	Base, 1.3L Eng VIN W	View 2025 Tonale ›
2025	Alfa Romeo Tonale	Base, 2.0L Eng VIN N	View 2025 Tonale ›
2023	BMW X1	X1	View 2023 X1 ›
2024	BMW X1	xDrive28i	View 2024 X1 ›
2025	BMW X1	M35i	View 2025 X1 ›
2020	Buick Encore GX	Essence, 1.3L Eng VIN L, FWD	View 2020 Encore GX ›
2020	Buick Encore GX	Essence, 1.3L Eng VIN L, 4WD	View 2020 Encore GX ›
2020	Buick Encore GX	Preferred, 1.2L Eng VIN 2	View 2020 Encore GX ›
2020	Buick Encore GX	Preferred, 1.3L Eng VIN L	View 2020 Encore GX ›
2020	Buick Encore GX	Essence, 1.2L Eng VIN 2	View 2020 Encore GX ›
2020	Buick Encore GX	Select, 1.3L Eng VIN L, 4WD	View 2020 Encore GX ›
2020	Buick Encore GX	Select, 1.2L Eng VIN 2	View 2020 Encore GX ›
2020	Buick Encore GX	Select, 1.3L Eng VIN L, FWD	View 2020 Encore GX ›
2021	Buick Encore GX	Essence, 1.2L Eng VIN 2	View 2021 Encore GX ›
2021	Buick Encore GX	Select, 1.2L Eng VIN 2	View 2021 Encore GX ›
2021	Buick Encore GX	Essence, 1.3L Eng VIN L, 4WD	View 2021 Encore GX ›
2021	Buick Encore GX	Essence, 1.3L Eng VIN L, FWD	View 2021 Encore GX ›
2021	Buick Encore GX	Preferred, 1.2L Eng VIN 2	View 2021 Encore GX ›
2021	Buick Encore GX	Select, 1.3L Eng VIN L, FWD	View 2021 Encore GX ›
2021	Buick Encore GX	Select, 1.3L Eng VIN L, 4WD	View 2021 Encore GX ›
2021	Buick Encore GX	Preferred, 1.3L Eng VIN L	View 2021 Encore GX ›
2022	Buick Encore GX	Essence, 4WD	View 2022 Encore GX ›
2022	Buick Encore GX	Essence, FWD	View 2022 Encore GX ›
2022	Buick Encore GX	Preferred, 1.2L Eng VIN 2	View 2022 Encore GX ›
2022	Buick Encore GX	Preferred, 1.3L Eng VIN L	View 2022 Encore GX ›
2022	Buick Encore GX	Select, 1.2L Eng VIN 2	View 2022 Encore GX ›
2022	Buick Encore GX	Select, 1.3L Eng VIN L, 4WD	View 2022 Encore GX ›
2022	Buick Encore GX	Select, 1.3L Eng VIN L, FWD	View 2022 Encore GX ›
2023	Buick Encore GX	Essence, 4WD	View 2023 Encore GX ›
2023	Buick Encore GX	Preferred, 1.2L Eng VIN 2	View 2023 Encore GX ›
2023	Buick Encore GX	Preferred, 1.3L Eng VIN L	View 2023 Encore GX ›
2023	Buick Encore GX	Essence, FWD	View 2023 Encore GX ›
2023	Buick Encore GX	Select, 1.3L Eng VIN L, 4WD	View 2023 Encore GX ›
2023	Buick Encore GX	Select, 1.3L Eng VIN L, FWD	View 2023 Encore GX ›
2023	Buick Encore GX	Select, 1.2L Eng VIN 2	View 2023 Encore GX ›
2024	Buick Envista	Sport Touring	View 2024 Envista ›
2024	Buick Encore GX	Sport Touring, 4WD	View 2024 Encore GX ›
2024	Buick Encore GX	Sport Touring, FWD	View 2024 Encore GX ›
2024	Buick Encore GX	Preferred, 1.2L Eng VIN 2	View 2024 Encore GX ›
2024	Buick Encore GX	Preferred, 1.3L Eng VIN L, 4WD	View 2024 Encore GX ›
2024	Buick Encore GX	Preferred, 1.3L Eng VIN L, FWD	View 2024 Encore GX ›
2025	Buick Encore GX	Preferred, 1.3L Eng VIN L, FWD	View 2025 Encore GX ›
2025	Buick Encore GX	Preferred, 1.3L Eng VIN L, 4WD	View 2025 Encore GX ›
2025	Buick Encore GX	Sport Touring, FWD	View 2025 Encore GX ›
2025	Buick Encore GX	Preferred, 1.2L Eng VIN P	View 2025 Encore GX ›
2025	Buick Encore GX	Sport Touring, 4WD	View 2025 Encore GX ›
2025	Buick Envista	Sport Touring	View 2025 Envista ›
2021	Chevrolet Trailblazer	RS, 4WD	View 2021 Trailblazer ›
2021	Chevrolet Trailblazer	RS, FWD	View 2021 Trailblazer ›
2022	Chevrolet Trailblazer	RS, 4WD	View 2022 Trailblazer ›
2022	Chevrolet Trailblazer	RS, FWD	View 2022 Trailblazer ›
2023	Chevrolet Trailblazer	RS, 4WD	View 2023 Trailblazer ›
2023	Chevrolet Trailblazer	RS, FWD	View 2023 Trailblazer ›
2024	Chevrolet Trax	ACTIV	View 2024 Trax ›
2024	Chevrolet Trax	RS	View 2024 Trax ›
2025	Chevrolet Trax	ACTIV	View 2025 Trax ›
2025	Chevrolet Trax	RS	View 2025 Trax ›
2024	Dodge Hornet	R/T	View 2024 Hornet ›
2024	Dodge Hornet	R/T Plus	View 2024 Hornet ›
2025	Dodge Hornet	R/T	View 2025 Hornet ›
2025	Dodge Hornet	R/T Plus	View 2025 Hornet ›
2023	Honda HR-V	Sport, AWD	View 2023 HR-V ›
2023	Honda HR-V	Sport, FWD	View 2023 HR-V ›
2024	Honda HR-V	Sport, FWD	View 2024 HR-V ›
2024	Honda HR-V	Sport, AWD	View 2024 HR-V ›
2025	Honda HR-V	Sport, AWD	View 2025 HR-V ›
2025	Honda HR-V	Sport, FWD	View 2025 HR-V ›
2010	Hyundai Tucson	Limited, 4WD	View 2010 Tucson ›
2010	Hyundai Tucson	Limited, FWD	View 2010 Tucson ›
2011	Hyundai Tucson	Limited, 4WD	View 2011 Tucson ›
2011	Hyundai Tucson	Limited, FWD	View 2011 Tucson ›
2012	Hyundai Tucson	Limited, 4WD	View 2012 Tucson ›
2012	Hyundai Tucson	Limited, FWD	View 2012 Tucson ›
2013	Hyundai Tucson	Limited, 4WD	View 2013 Tucson ›
2013	Hyundai Tucson	Limited, FWD	View 2013 Tucson ›
2014	Hyundai Tucson	Limited, 4WD	View 2014 Tucson ›
2014	Hyundai Tucson	Limited, FWD	View 2014 Tucson ›
2015	Hyundai Tucson	Limited, 4WD	View 2015 Tucson ›
2015	Hyundai Tucson	Limited, FWD	View 2015 Tucson ›
2019	Hyundai Tucson	Limited, 4WD	View 2019 Tucson ›
2019	Hyundai Tucson	Limited, FWD	View 2019 Tucson ›
2019	Hyundai Tucson	SEL, 4WD	View 2019 Tucson ›
2019	Hyundai Tucson	SEL, FWD	View 2019 Tucson ›
2019	Hyundai Tucson	Ultimate, 4WD	View 2019 Tucson ›
2019	Hyundai Tucson	Ultimate, FWD	View 2019 Tucson ›
2020	Hyundai Tucson	Limited, 4WD	View 2020 Tucson ›
2020	Hyundai Tucson	Limited, FWD	View 2020 Tucson ›
2020	Hyundai Tucson	SEL, 4WD	View 2020 Tucson ›
2020	Hyundai Tucson	SEL, FWD	View 2020 Tucson ›
2020	Hyundai Tucson	Ultimate, 4WD	View 2020 Tucson ›
2020	Hyundai Tucson	Ultimate, FWD	View 2020 Tucson ›
2021	Hyundai Tucson	Limited, 4WD	View 2021 Tucson ›
2021	Hyundai Tucson	Limited, FWD	View 2021 Tucson ›
2021	Hyundai Tucson	SEL, FWD	View 2021 Tucson ›
2021	Hyundai Tucson	SEL, 4WD	View 2021 Tucson ›
2021	Hyundai Tucson	Ultimate, 4WD	View 2021 Tucson ›
2021	Hyundai Tucson	Ultimate, FWD	View 2021 Tucson ›
2023	Hyundai Ioniq 6	SE, RWD	View 2023 Ioniq 6 ›
2023	Hyundai Ioniq 6	SE, AWD	View 2023 Ioniq 6 ›
2024	Hyundai Ioniq 6	SE, RWD	View 2024 Ioniq 6 ›
2024	Hyundai Ioniq 6	SE, AWD	View 2024 Ioniq 6 ›
2025	Hyundai Ioniq 6	SE Standard Range	View 2025 Ioniq 6 ›
2025	Hyundai Ioniq 6	SE, RWD	View 2025 Ioniq 6 ›
2025	Hyundai Ioniq 6	SE, AWD	View 2025 Ioniq 6 ›
2015	Jeep Renegade	Limited, FWD	View 2015 Renegade ›
2015	Jeep Renegade	Limited, 4WD	View 2015 Renegade ›
2016	Jeep Renegade	75th Anniversary Edition, 1.4L Eng VIN H, 4WD	View 2016 Renegade ›
2016	Jeep Renegade	Dawn of Justice	View 2016 Renegade ›
2016	Jeep Renegade	75th Anniversary Edition, 2.4L Eng VIN T, 4WD	View 2016 Renegade ›
2016	Jeep Renegade	75th Anniversary Edition, 1.4L Eng VIN H, FWD	View 2016 Renegade ›
2016	Jeep Renegade	Limited, 4WD	View 2016 Renegade ›
2016	Jeep Renegade	Limited, FWD	View 2016 Renegade ›
2017	Jeep Compass	Limited	View 2017 Compass ›
2017	Jeep Renegade	Limited, 4WD	View 2017 Renegade ›
2017	Jeep Renegade	Limited, FWD	View 2017 Renegade ›
2018	Jeep Compass	Limited, 4WD	View 2018 Compass ›
2018	Jeep Compass	Limited, FWD	View 2018 Compass ›
2018	Jeep Renegade	Altitude, 1.4L Eng VIN H, 4WD	View 2018 Renegade ›
2018	Jeep Renegade	Altitude, 1.4L Eng VIN H, FWD	View 2018 Renegade ›
2018	Jeep Renegade	Altitude, 2.4L Eng VIN B, Eng CD ED6, Gas	View 2018 Renegade ›
2018	Jeep Renegade	Altitude, 2.4L Eng VIN B, Eng CD ED6, Gas/Ethanol	View 2018 Renegade ›
2018	Jeep Renegade	Altitude, 2.4L Eng VIN B, Eng CD ED8, 4WD	View 2018 Renegade ›
2018	Jeep Renegade	Altitude, 2.4L Eng VIN B, Eng CD ED8, FWD	View 2018 Renegade ›
2018	Jeep Renegade	Limited, Eng CD ED6, Gas	View 2018 Renegade ›
2018	Jeep Renegade	Limited, Eng CD ED6, Gas/Ethanol	View 2018 Renegade ›
2018	Jeep Renegade	Limited, Eng CD ED8, 4WD	View 2018 Renegade ›
2018	Jeep Renegade	Limited, Eng CD ED8, FWD	View 2018 Renegade ›
2019	Jeep Compass	Limited, 4WD	View 2019 Compass ›
2019	Jeep Compass	Limited, FWD	View 2019 Compass ›
2019	Jeep Renegade	Altitude, 1.3L Eng VIN 1, 4WD	View 2019 Renegade ›
2019	Jeep Renegade	Altitude, 1.3L Eng VIN 1, FWD	View 2019 Renegade ›
2019	Jeep Renegade	Altitude, 2.4L Eng VIN B, 4WD	View 2019 Renegade ›
2019	Jeep Renegade	Altitude, 2.4L Eng VIN B, FWD	View 2019 Renegade ›
2019	Jeep Renegade	Limited, 4WD	View 2019 Renegade ›
2019	Jeep Renegade	Limited, FWD	View 2019 Renegade ›
2020	Jeep Compass	Altitude, Eng CD ED6	View 2020 Compass ›
2020	Jeep Compass	Altitude, Eng CD EDE, 4WD	View 2020 Compass ›
2020	Jeep Compass	Altitude, Eng CD EDE, FWD	View 2020 Compass ›
2020	Jeep Compass	Limited, 4WD	View 2020 Compass ›
2020	Jeep Compass	Limited, FWD	View 2020 Compass ›
2020	Jeep Renegade	Limited, 4WD	View 2020 Renegade ›
2020	Jeep Renegade	Limited, FWD	View 2020 Renegade ›
2021	Jeep Compass	Limited, FWD	View 2021 Compass ›
2021	Jeep Compass	Altitude, 4WD	View 2021 Compass ›
2021	Jeep Compass	Altitude, FWD	View 2021 Compass ›
2021	Jeep Compass	Limited, 4WD	View 2021 Compass ›