What is the diameter of a 225/50R18 tire?

A 225/50R18 tire has an overall diameter of 26.86 inches (682.2mm).

How many revolutions per mile does a 225/50R18 tire make?

A 225/50R18 tire makes approximately 751 revolutions per mile.

What rim width is recommended for 225/50R18 tires?

The recommended wheel rim width for a 225/50R18 tire is 5.6" - 7.9".

225/50R18

Standard Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The 225/50R18 tire size features an overall diameter of 26.86 inches, a section width of 8.9 inches (225mm), and rotates 751 times per mile. It is a standard factory tire fitment on 150+ vehicle models including Acura TLX.

Shop 225/50R18 Tires on Tire Rack →Buy on Amazon →

Physical Dimensions & Specs

Overall Diameter

26.86"

682.2 mm

Section Width

225 mm

8.86" wide

Sidewall Height

4.43"

112.5 mm (50% aspect)

Revolutions / Mile

751

Circumference: 84.38"

Rim Diameter

18"

Wheel size

Recommended Rim Width

5.6" - 7.9"

Optimal rim width range

Where to Buy & Install 225/50R18 Tires

Looking for 225/50R18 tires? Skip hauling tires in your car—choose direct delivery to a local certified shop or doorstep delivery:

⭐ Recommended · Ship to Local Shop

Tire Rack

Free shipping directly to over 10,000+ certified local installers.

✓Delivered to local installer (Firestone, Discount Tire & local shops)
✓Mobile installation available — mount & balance right in your driveway
✓Free 2-year road hazard warranty on most eligible tire models

🏎️Find 225/50R18 on Tire Rack (Local Install) →

Direct Home Delivery

Amazon Automotive

Fast doorstep shipping for DIYers or bringing to your own shop.

✓Prime doorstep shipping for home garages or spares
✓Huge range of budget and specialty tire sizes in stock
✓Ideal if you have a local independent mechanic you prefer

🛒Shop 225/50R18 on Amazon →

As an affiliate for Tire Rack and Amazon, we earn from qualifying purchases at no extra cost to you.

Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare 225/50R18 against any proposed tire size below:

Popular Comparisons:

Tire 1 (Stock / Base)225/50R18

Section Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Wheel Width (in)

Offset ET (mm)

Overall Height:26.9"

Sidewall:4.4"

Revs/Mile:751

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

+10.1%At 60 mph reading, actual speed is 66.1 mph

Indicated	Actual Speed	Diff
20 mph	22.0 mph	+2.0 mph
30 mph	33.0 mph	+3.0 mph
45 mph	49.6 mph	+4.6 mph
60 mph	66.1 mph	+6.1 mph
75 mph	82.6 mph	+7.6 mph
90 mph	99.1 mph	+9.1 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:+1.36" ground clearance

Vehicles That Fit 225/50R18 (150+ Models)

Factory standard and optional vehicle fitments utilizing 225/50R18 tires:

Year	Make & Model	Trim / Variant	Lookup Specs
2015	Acura TLX	Base, 3.5L Eng	View 2015 TLX ›
2015	Acura TLX	SH-AWD	View 2015 TLX ›
2016	Acura TLX	Base, 3.5L Eng	View 2016 TLX ›
2016	Acura TLX	SH-AWD	View 2016 TLX ›
2017	Acura TLX	Base, 3.5L Eng	View 2017 TLX ›
2017	Acura TLX	SH-AWD	View 2017 TLX ›
2018	Acura TLX	SH-AWD	View 2018 TLX ›
2018	Acura TLX	Base, 3.5L Eng	View 2018 TLX ›
2019	Acura TLX	Base, 3.5L Eng	View 2019 TLX ›
2019	Acura TLX	SH-AWD	View 2019 TLX ›
2020	Acura TLX	Base, 3.5L Eng	View 2020 TLX ›
2020	Acura TLX	SH-AWD	View 2020 TLX ›
2014	BMW 328i GT xDrive	328i GT xDrive	View 2014 328i GT xDrive ›
2014	BMW 335i GT xDrive	335i GT xDrive	View 2014 335i GT xDrive ›
2015	BMW 328i GT xDrive	Eng CD N20B20A	View 2015 328i GT xDrive ›
2015	BMW 328i GT xDrive	Eng CD N26B20A	View 2015 328i GT xDrive ›
2015	BMW 335i GT xDrive	335i GT xDrive	View 2015 335i GT xDrive ›
2016	BMW 328i GT xDrive	Eng CD N20B20A	View 2016 328i GT xDrive ›
2016	BMW 328i GT xDrive	Eng CD N26B20A	View 2016 328i GT xDrive ›
2016	BMW 335i GT xDrive	335i GT xDrive	View 2016 335i GT xDrive ›
2016	BMW X1	X1	View 2016 X1 ›
2017	BMW X1	sDrive28i	View 2017 X1 ›
2017	BMW X1	xDrive28i	View 2017 X1 ›
2017	BMW 330i GT xDrive	330i GT xDrive	View 2017 330i GT xDrive ›
2017	BMW 340i GT xDrive	340i GT xDrive	View 2017 340i GT xDrive ›
2018	BMW X1	sDrive28i	View 2018 X1 ›
2018	BMW X1	xDrive28i	View 2018 X1 ›
2018	BMW X2	sDrive28i	View 2018 X2 ›
2018	BMW X2	xDrive28i	View 2018 X2 ›
2018	BMW 330i GT xDrive	330i GT xDrive	View 2018 330i GT xDrive ›
2018	BMW 340i GT xDrive	340i GT xDrive	View 2018 340i GT xDrive ›
2019	BMW X1	sDrive28i	View 2019 X1 ›
2019	BMW X1	xDrive28i	View 2019 X1 ›
2019	BMW X2	sDrive28i	View 2019 X2 ›
2019	BMW X2	xDrive28i	View 2019 X2 ›
2019	BMW 330i GT xDrive	330i GT xDrive	View 2019 330i GT xDrive ›
2019	BMW 340i GT xDrive	340i GT xDrive	View 2019 340i GT xDrive ›
2020	BMW X1	sDrive28i	View 2020 X1 ›
2020	BMW X1	xDrive28i	View 2020 X1 ›
2020	BMW X2	sDrive28i	View 2020 X2 ›
2020	BMW X2	xDrive28i	View 2020 X2 ›
2021	BMW X1	sDrive28i	View 2021 X1 ›
2021	BMW X1	xDrive28i	View 2021 X1 ›
2021	BMW X2	sDrive28i	View 2021 X2 ›
2021	BMW X2	xDrive28i	View 2021 X2 ›
2022	BMW X1	sDrive28i	View 2022 X1 ›
2022	BMW X1	xDrive28i	View 2022 X1 ›
2022	BMW X2	xDrive28i	View 2022 X2 ›
2022	BMW X2	sDrive28i	View 2022 X2 ›
2022	BMW i4	eDrive40	View 2022 i4 ›
2023	BMW X2	xDrive28i	View 2023 X2 ›
2023	BMW X2	sDrive28i	View 2023 X2 ›
2023	BMW i4	eDrive35	View 2023 i4 ›
2023	BMW i4	eDrive40	View 2023 i4 ›
2024	BMW i4	eDrive35	View 2024 i4 ›
2024	BMW i4	eDrive40	View 2024 i4 ›
2024	BMW i4	xDrive40	View 2024 i4 ›
2025	BMW i4	eDrive40	View 2025 i4 ›
2025	BMW i4	xDrive40	View 2025 i4 ›
2019	Honda HR-V	Sport, AWD	View 2019 HR-V ›
2019	Honda HR-V	Sport, FWD	View 2019 HR-V ›
2020	Honda HR-V	Sport, FWD	View 2020 HR-V ›
2020	Honda HR-V	Sport, AWD	View 2020 HR-V ›
2021	Honda HR-V	Sport, AWD	View 2021 HR-V ›
2021	Honda HR-V	Sport, FWD	View 2021 HR-V ›
2022	Honda HR-V	Sport, AWD	View 2022 HR-V ›
2022	Honda HR-V	Sport, FWD	View 2022 HR-V ›
2007	Infiniti G35	Base, 4D Sedan, Automatic	View 2007 G35 ›
2007	Infiniti G35	Base, 4D Sedan, Standard	View 2007 G35 ›
2008	Infiniti G35	Sport	View 2008 G35 ›
2009	Infiniti G37	Sport, 4D Sedan	View 2009 G37 ›
2010	Infiniti G37	Sport, 4D Sedan	View 2010 G37 ›
2011	Infiniti G37	Sport, 4D Sedan	View 2011 G37 ›
2012	Infiniti G37	Sport, 4D Sedan	View 2012 G37 ›
2013	Infiniti G37	Sport, 4D Sedan	View 2013 G37 ›
2019	Lexus UX 200	Base	View 2019 UX 200 ›
2019	Lexus UX 200	Luxury	View 2019 UX 200 ›
2019	Lexus UX 200	F Sport	View 2019 UX 200 ›
2019	Lexus UX 250h	Base	View 2019 UX 250h ›
2019	Lexus UX 250h	F Sport	View 2019 UX 250h ›
2019	Lexus UX 250h	Luxury	View 2019 UX 250h ›
2020	Lexus UX 250h	F Sport	View 2020 UX 250h ›
2020	Lexus UX 250h	Base	View 2020 UX 250h ›
2020	Lexus UX 200	Base	View 2020 UX 200 ›
2020	Lexus UX 200	Luxury	View 2020 UX 200 ›
2020	Lexus UX 200	F Sport	View 2020 UX 200 ›
2021	Lexus UX 200	Base	View 2021 UX 200 ›
2021	Lexus UX 200	F Sport	View 2021 UX 200 ›
2021	Lexus UX 200	Luxury	View 2021 UX 200 ›
2021	Lexus UX 250h	F Sport	View 2021 UX 250h ›
2021	Lexus UX 250h	Base	View 2021 UX 250h ›
2021	Lexus UX 250h	Luxury	View 2021 UX 250h ›
2022	Lexus UX 250h	Base	View 2022 UX 250h ›
2022	Lexus UX 250h	Luxury	View 2022 UX 250h ›
2022	Lexus UX 250h	F Sport	View 2022 UX 250h ›
2022	Lexus UX 200	Luxury	View 2022 UX 200 ›
2022	Lexus UX 200	F Sport	View 2022 UX 200 ›
2022	Lexus UX 200	Base	View 2022 UX 200 ›
2023	Lexus UX 250h	F Sport Design, 2.0L Eng VIN 6	View 2023 UX 250h ›
2023	Lexus UX 250h	F Sport Design, 2.0L Eng VIN 9	View 2023 UX 250h ›
2023	Lexus UX 250h	F Sport Handling, 2.0L Eng VIN 9	View 2023 UX 250h ›
2023	Lexus UX 250h	Base, 2.0L Eng VIN 6	View 2023 UX 250h ›
2023	Lexus UX 250h	Base, 2.0L Eng VIN 9	View 2023 UX 250h ›
2023	Lexus UX 250h	F Sport Handling, 2.0L Eng VIN 6	View 2023 UX 250h ›
2023	Lexus UX 250h	Premium, 2.0L Eng VIN 9	View 2023 UX 250h ›
2023	Lexus UX 250h	Premium, 2.0L Eng VIN 6	View 2023 UX 250h ›
2024	Lexus UX 250h	Base, 2.0L Eng VIN 6	View 2024 UX 250h ›
2024	Lexus UX 250h	F Sport Design, 2.0L Eng VIN 6	View 2024 UX 250h ›
2024	Lexus UX 250h	Base, 2.0L Eng VIN 9	View 2024 UX 250h ›
2024	Lexus UX 250h	F Sport Handling, 2.0L Eng VIN 6	View 2024 UX 250h ›
2024	Lexus UX 250h	Premium, 2.0L Eng VIN 6	View 2024 UX 250h ›
2024	Lexus UX 250h	Premium, 2.0L Eng VIN 9	View 2024 UX 250h ›
2024	Lexus UX 250h	F Sport Design, 2.0L Eng VIN 9	View 2024 UX 250h ›
2024	Lexus UX 250h	F Sport Handling, 2.0L Eng VIN 9	View 2024 UX 250h ›
2025	Lexus UX 300h	Base, 2.0L Eng VIN C	View 2025 UX 300h ›
2025	Lexus UX 300h	F Sport Design, 2.0L Eng VIN B	View 2025 UX 300h ›
2025	Lexus UX 300h	Base, 2.0L Eng VIN B	View 2025 UX 300h ›
2025	Lexus UX 300h	F Sport Design, 2.0L Eng VIN C	View 2025 UX 300h ›
2025	Lexus UX 300h	F Sport Handling, 2.0L Eng VIN B	View 2025 UX 300h ›
2025	Lexus UX 300h	F Sport Handling, 2.0L Eng VIN C	View 2025 UX 300h ›
2025	Lexus UX 300h	Premium, 2.0L Eng VIN B	View 2025 UX 300h ›
2025	Lexus UX 300h	Premium, 2.0L Eng VIN C	View 2025 UX 300h ›
2018	Mini Cooper Countryman	JCW ALL4, Automatic Trans	View 2018 Cooper Countryman ›
2018	Mini Cooper Countryman	JCW ALL4, Standard Trans	View 2018 Cooper Countryman ›
2019	Mini Cooper Countryman	JCW ALL4, Automatic Trans	View 2019 Cooper Countryman ›
2019	Mini Cooper Countryman	JCW ALL4, Standard Trans	View 2019 Cooper Countryman ›
2019	Mini Cooper Countryman	S	View 2019 Cooper Countryman ›
2019	Mini Cooper Countryman	S ALL4, Automatic Trans	View 2019 Cooper Countryman ›
2019	Mini Cooper Countryman	S ALL4, Standard Trans	View 2019 Cooper Countryman ›
2020	Mini Cooper Countryman	S ALL4, Automatic Trans	View 2020 Cooper Countryman ›
2020	Mini Cooper Countryman	S ALL4, Standard Trans	View 2020 Cooper Countryman ›
2020	Mini Cooper Countryman	JCW ALL4	View 2020 Cooper Countryman ›
2020	Mini Cooper Countryman	S	View 2020 Cooper Countryman ›
2021	Mini Cooper Countryman	S	View 2021 Cooper Countryman ›
2021	Mini Cooper Countryman	JCW ALL4	View 2021 Cooper Countryman ›
2021	Mini Cooper Countryman	S ALL4	View 2021 Cooper Countryman ›
2022	Mini Cooper Countryman	S	View 2022 Cooper Countryman ›
2022	Mini Cooper Countryman	S ALL4	View 2022 Cooper Countryman ›
2022	Mini Cooper Countryman	JCW ALL4	View 2022 Cooper Countryman ›
2023	Mini Cooper Countryman	S ALL4	View 2023 Cooper Countryman ›
2023	Mini Cooper Countryman	JCW ALL4	View 2023 Cooper Countryman ›
2023	Mini Cooper Countryman	S	View 2023 Cooper Countryman ›
2024	Mini Cooper Countryman	JCW ALL4	View 2024 Cooper Countryman ›
2024	Mini Cooper Countryman	S ALL4	View 2024 Cooper Countryman ›
2024	Mini Cooper Countryman	S	View 2024 Cooper Countryman ›
2009	Nissan 370Z	Base, Standard	View 2009 370Z ›
2009	Nissan 370Z	Base, Automatic	View 2009 370Z ›
2009	Nissan 370Z	Touring, Automatic	View 2009 370Z ›
2009	Nissan 370Z	Touring, Standard	View 2009 370Z ›
2010	Nissan 370Z	Base, 2D Convertible, Automatic	View 2010 370Z ›