235/65R18 In Inches – Tire Size & Rim Fitment Guide

What size tire is 235/65R18 in Inches?

The 235/65R18 tire has an overall diameter of 30 inches, a section width of 9.3 inches, and can be mounted on 18 x 6.5-8.5 inches rim. The equivalent tire size in the high flotation system is 30x9.3R18.

Tire Diameter30762.7
Section Width9.3235
Rim Height18457
Sidewall Height6152.8
tire diameter
Tire Side
Tire Circumference
671.7 Revs/Mile

To make it clear, we'll break down each part of the 235/65R18 tire size to know what these numbers represent & how they may affect your vehicle tire's performance:

How tall is a 235/65R18 tire?

A 235/65R18 tire has a height of 30 inches (762.7 mm). This is the measurement from the bottom to the highest point at the top of a tire through its exact center when inflated and no load.

Tire Diameter
Tire diameter: 30 In.

How wide is a 235/65R18 tire?

The 235/65R18 has a width of 9.3 inches (235 mm). This is the tire measurement at its thickest point, the distance between the inner sidewall’s and the outer sidewall’s widest point, also known as section width or tread width.

tread width
Tread width: 9.3 In.

235/65R18 sidewall height

The sidewall height of a 235/65R18 is 6 inches (152.8 mm). It’s measured from the rim to the outer edge of the tire's tread, expressed as a percentage of tire width.

sidewall height
Sidewall height: 6 In.

What size rim do I need for 235/65R18 tire?

You can put on a rim with a height of 18 inches and a rim width ranging from 6.5-8.5 inches for a 235/65R18 tire. (Based on recommendations of The Tire and Rim Association (TRA))

Putting very wide tires on narrow rims or vice versa can result in reduced performance of the tire.

Rim Diameter
Rim height: 18 In.
rim width
Rim width: 6.5-8.5 In.

235/65R18 circumference

The 235/65R18 tire has a circumference of 94.3 inches (2396.1 mm), This is the measurement of the distance the tire covers in one full rotation.

The tire circumference is important for your vehicle's overall performance, affecting its speedometer accuracy, acceleration & fuel efficiency.

Circumference: 94.3 In.

235/65R18 Revolutions

The 235/65R18 performs 671.7 revs/mile. Revolutions per mile indicate the number of times a tire rotates while it covers the distance of one mile.

671.7 revs/mile

Alternative Tire Sizes for 235/65R18

As a rule, you can replace the tire within a 3% difference in tire diameter (height) of the OEM tire size. Here is the full list of replacement sizes compatible with 235/65R18:

Tire SizeDiameterRim (H x W)
235/75R1730.9″ (+2.9%)17″ x 6.0-8.0″
275/55R1930.9″ (+2.9%)19″ x 7.5-9.5″
315/40R2130.9″ (+2.9%)21″ x 10.5-12.5″
275/50R2030.8″ (+2.6%)20″ x 7.5-9.5″
305/45R2030.8″ (+2.6%)20″ x 9.5-11.5″
165/90R1930.7″ (+2.3%)19″ x n/a
275/45R2130.7″ (+2.3%)21″ x 8.5-10.5″
265/65R1730.6″ (+2%)17″ x 7.5-9.5″
245/70R1730.5″ (+1.6%)17″ x 6.5-8.0″
285/60R1730.5″ (+1.6%)17″ x 8.0-10.0″
245/65R1830.5″ (+1.6%)18″ x 7.0-8.5″
265/60R1830.5″ (+1.6%)18″ x 7.5-9.5″
265/55R1930.5″ (+1.6%)19″ x 7.5-9.5″
295/45R2030.5″ (+1.6%)20″ x 9.5-11.0″
175/90R1830.4″ (+1.3%)18″ x n/a
265/50R2030.4″ (+1.3%)20″ x 7.5-9.5″
265/45R2130.4″ (+1.3%)21″ x 8.5-10.0″
225/75R1730.3″ (+1%)17″ x 6.0-7.5″
285/55R1830.3″ (+1%)18″ x 8.0-10.0″
295/40R2130.3″ (+1%)21″ x 10.0-11.5″
235/55R2030.2″ (+0.7%)20″ x 6.5-8.5″
215/75R17.530.2″ (+0.7%)17.5″ x n/a
255/65R1730.1″ (+0.3%)17″ x 7.0-8.5″
235/60R1930.1″ (+0.3%)19″ x 6.5-8.5″
285/45R2030.1″ (+0.3%)20″ x 9.0-10.5″
235/70R1730″ (Equal)17″ x 6.0-8.0″
275/60R1730″ (Equal)17″ x 7.5-9.5″
255/60R1830″ (Equal)18″ x 7.0-9.0″
175/80R1930″ (Equal)19″ x n/a
255/55R1930″ (Equal)19″ x 7.0-9.0″
255/50R2030″ (Equal)20″ x 7.0-9.0″
255/45R2130″ (Equal)21″ x 9.5-11.0″
285/40R2130″ (Equal)21″ x 9.5-11.0″
275/55R1829.9″ (-0.3%)18″ x 7.5-9.5″
275/50R1929.8″ (-0.7%)19″ x 7.5-9.5″
165/90R1829.7″ (-1%)18″ x n/a
275/45R2029.7″ (-1%)20″ x 8.5-10.5″
245/45R2129.7″ (-1%)21″ x 7.5-9.0″
275/40R2129.7″ (-1%)21″ x 9.0-11.0″
315/35R2129.7″ (-1%)21″ x 10.5-12.5″
245/60R1829.6″ (-1.4%)18″ x 7.0-8.5″
245/55R1929.6″ (-1.4%)19″ x 7.0-8.5″
245/50R2029.6″ (-1.4%)20″ x 7.0-8.5″
305/40R2029.6″ (-1.4%)20″ x 10.0-12.0″
245/65R1729.5″ (-1.7%)17″ x 7.0-8.5″
265/60R1729.5″ (-1.7%)17″ x 7.5-9.5″
225/65R1829.5″ (-1.7%)18″ x 6.0-8.0″
265/55R1829.5″ (-1.7%)18″ x 7.5-9.5″
325/45R1829.5″ (-1.7%)18″ x n/a
295/45R1929.5″ (-1.7%)19″ x 9.5-11.0″
175/90R1729.4″ (-2%)17″ x n/a
225/70R1729.4″ (-2%)17″ x 6.0-7.5″
265/50R1929.4″ (-2%)19″ x 7.5-9.5″
265/45R2029.4″ (-2%)20″ x 8.5-10.0″
305/35R2129.4″ (-2%)21″ x 10.0-12.0″
235/50R2029.3″ (-2.4%)20″ x 6.5-8.5″
295/40R2029.3″ (-2.4%)20″ x 10.0-11.5″
235/45R2129.3″ (-2.4%)21″ x 7.5-9.0″
265/40R2129.3″ (-2.4%)21″ x 9.0-10.5″
285/50R1829.2″ (-2.7%)18″ x 8.0-10.0″
235/55R1929.2″ (-2.7%)19″ x 6.5-8.5″

More tire sizes for 18" Wheel:

23″ Tire Diameter

24″ Tire Diameter

25″ Tire Diameter

26″ Tire Diameter

27″ Tire Diameter

28″ Tire Diameter

29″ Tire Diameter

30″ Tire Diameter

31″ Tire Diameter

32″ Tire Diameter

33″ Tire Diameter

34″ Tire Diameter

35″ Tire Diameter

36″ Tire Diameter

38″ Tire Diameter

*Disclaimer: Please note that our tire dimensions & measurements are an approximation number, while the tire manufacturers may have different ways in calculating or rounding numbers. We recommend referring to the vehicle manufacturer's manual or checking with the tire technician to find out the correct tire size for your vehicle.

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