What is the diameter of a 225/35R18 tire?

A 225/35R18 tire has an overall diameter of 24.2 inches (614.7mm).

How many revolutions per mile does a 225/35R18 tire make?

A 225/35R18 tire makes approximately 833 revolutions per mile.

What rim width is recommended for 225/35R18 tires?

The recommended wheel rim width for a 225/35R18 tire is 5.6" - 7.9".

225/35R18

Standard Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The 225/35R18 tire size features an overall diameter of 24.2 inches, a section width of 8.9 inches (225mm), and rotates 833 times per mile. It is a standard factory tire fitment on 1+ vehicle models including Mini Cooper.

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Physical Dimensions & Specs

Overall Diameter

24.2"

614.7 mm

Section Width

225 mm

8.86" wide

Sidewall Height

3.1"

78.7 mm (35% aspect)

Revolutions / Mile

833

Circumference: 76.03"

Rim Diameter

18"

Wheel size

Recommended Rim Width

5.6" - 7.9"

Optimal rim width range

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Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare 225/35R18 against any proposed tire size below:

Popular Comparisons:

Tire 1 (Stock / Base)225/35R18

Section Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Wheel Width (in)

Offset ET (mm)

Overall Height:24.2"

Sidewall:3.1"

Revs/Mile:833

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

+22.2%At 60 mph reading, actual speed is 73.3 mph

Indicated	Actual Speed	Diff
20 mph	24.4 mph	+4.4 mph
30 mph	36.7 mph	+6.7 mph
45 mph	55.0 mph	+10.0 mph
60 mph	73.3 mph	+13.3 mph
75 mph	91.7 mph	+16.7 mph
90 mph	110.0 mph	+20.0 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:+2.69" ground clearance

Vehicles That Fit 225/35R18 (1+ Models)

Factory standard and optional vehicle fitments utilizing 225/35R18 tires:

Year	Make & Model	Trim / Variant	Lookup Specs
2021	Mini Cooper	JCW GP	View 2021 Cooper ›