245/55R18 In Inches – Tire Size & Rim Fitment Guide


What size tire is 245/55R18 in Inches?

The 245/55R18 tire has an overall diameter of 28.6 inches, a section width of 9.6 inches, and can be mounted on 18 x 7.0-8.5 inches rim. The equivalent tire size in the high flotation system is 28.6x9.6R18.

InchesMillimeters
Tire Diameter28.6726.7
Section Width9.6245
Rim Height18457
Sidewall Height5.3134.8
Circumference89.92283
tire diameter
9.6"
28.6"
Tire Side
Tire Circumference
89.9"
18"
5.3"
704.9 Revs/Mile

To make it clear, we'll break down each part of the 245/55R18 tire size to know what these numbers represent & how they may affect your vehicle tire's performance:



How tall is a 245/55R18 tire?

A 245/55R18 tire has a height of 28.6 inches (726.7 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: 28.6 In.


How wide is a 245/55R18 tire?

The 245/55R18 has a width of 9.6 inches (245 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: 9.6 In.


245/55R18 sidewall height

The sidewall height of a 245/55R18 is 5.3 inches (134.8 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: 5.3 In.


What size rim do I need for 245/55R18 tire?

You can put on a rim with a height of 18 inches and a rim width ranging from 7.0-8.5 inches for a 245/55R18 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: 7.0-8.5 In.


245/55R18 circumference

The 245/55R18 tire has a circumference of 89.9 inches (2283 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
Circumference: 89.9 In.


245/55R18 Revolutions

The 245/55R18 performs 704.9 revs/mile. Revolutions per mile indicate the number of times a tire rotates while it covers the distance of one mile.

Revolutions
704.9 revs/mile


Alternative Tire Sizes for 245/55R18

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 245/55R18:

Tire SizeDiameterRim (H x W)
175/90R1729.4″ (+2.7%)17″ x n/a
225/70R1729.4″ (+2.7%)17″ x 6.0-7.5″
265/50R1929.4″ (+2.7%)19″ x 7.5-9.5″
265/45R2029.4″ (+2.7%)20″ x 8.5-10.0″
305/35R2129.4″ (+2.7%)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″ (+2.1%)18″ x 8.0-10.0″
235/55R1929.2″ (+2.1%)19″ x 6.5-8.5″
235/60R1829.1″ (+1.7%)18″ x 6.5-8.5″
285/45R1929.1″ (+1.7%)19″ x 9.0-10.5″
145/80R2029.1″ (+1.7%)20″ x n/a
295/35R2129.1″ (+1.7%)21″ x 10.0-11.5″
235/65R1729″ (+1.4%)17″ x 6.5-8.5″
255/60R1729″ (+1.4%)17″ x 7.0-9.0″
155/90R1829″ (+1.4%)18″ x n/a
175/80R1829″ (+1.4%)18″ x n/a
255/55R1829″ (+1.4%)18″ x 7.0-9.0″
255/50R1929″ (+1.4%)19″ x 7.0-9.0″
255/45R2029″ (+1.4%)20″ x 8.0-9.5″
285/40R2029″ (+1.4%)20″ x 9.5-11.0″
325/35R2029″ (+1.4%)20″ x 11.0-13.0″
255/40R2129″ (+1.4%)21″ x 8.5-10.0″
215/70R1728.9″ (+1%)17″ x 5.5-7.0″
275/55R1728.9″ (+1%)17″ x 7.5-9.5″
315/40R1928.9″ (+1%)19″ x 11.0-12.0″
285/35R2128.9″ (+1%)21″ x 9.5-11.0″
275/50R1828.8″ (+0.7%)18″ x 7.5-9.5″
305/45R1828.8″ (+0.7%)18″ x 9.5-11.5″
155/80R1928.8″ (+0.7%)19″ x n/a
165/90R1728.7″ (+0.3%)17″ x n/a
225/55R1928.7″ (+0.3%)19″ x 6.0-8.0″
275/45R1928.7″ (+0.3%)19″ x 8.5-10.5″
245/45R2028.7″ (+0.3%)20″ x 7.5-9.0″
275/40R2028.7″ (+0.3%)20″ x 9.0-11.0″
315/35R2028.7″ (+0.3%)20″ x 10.5-12.5″
245/40R2128.7″ (+0.3%)21″ x 8.0-9.5″
325/30R2128.7″ (+0.3%)21″ x 11.0-12.0″
245/60R1728.6″ (Equal)17″ x 7.0-8.5″
225/60R1828.6″ (Equal)18″ x 6.0-8.0″
245/50R1928.6″ (Equal)19″ x 7.0-8.5″
275/35R2128.6″ (Equal)21″ x 9.0-11.0″
225/65R1728.5″ (-0.4%)17″ x 6.0-8.0″
265/55R1728.5″ (-0.4%)17″ x 7.5-9.5″
295/45R1828.5″ (-0.4%)18″ x 9.5-11.0″
345/35R1928.5″ (-0.4%)19″ x 11.5-13.5″
155/85R1828.4″ (-0.7%)18″ x n/a
265/50R1828.4″ (-0.7%)18″ x 7.5-9.5″
265/45R1928.4″ (-0.7%)19″ x 8.5-10.0″
305/35R2028.4″ (-0.7%)20″ x 10.0-12.0″
315/30R2128.4″ (-0.7%)21″ x 10.5-11.5″
235/50R1928.3″ (-1.1%)19″ x 6.5-8.5″
295/40R1928.3″ (-1.1%)19″ x 10.0-11.5″
235/45R2028.3″ (-1.1%)20″ x 7.5-9.0″
265/40R2028.3″ (-1.1%)20″ x 9.0-10.5″
265/35R2128.3″ (-1.1%)21″ x 9.0-10.5″
315/45R1728.2″ (-1.4%)17″ x 10.0-12.0″
235/55R1828.2″ (-1.4%)18″ x 6.5-8.5″
305/30R2128.2″ (-1.4%)21″ x 10.5-11.5″
235/60R1728.1″ (-1.8%)17″ x 6.5-8.5″
285/45R1828.1″ (-1.8%)18″ x 9.0-10.5″
145/80R1928.1″ (-1.8%)19″ x n/a
295/35R2028.1″ (-1.8%)20″ x 10.0-11.5″
345/30R2028.1″ (-1.8%)20″ x 12.0-13.0″
155/90R1728″ (-2.1%)17″ x n/a
215/65R1728″ (-2.1%)17″ x 6.0-7.5″
255/55R1728″ (-2.1%)17″ x 7.0-9.0″
255/50R1828″ (-2.1%)18″ x 7.0-9.0″
255/45R1928″ (-2.1%)19″ x 8.0-9.5″
285/40R1928″ (-2.1%)19″ x 9.5-11.0″
225/45R2028″ (-2.1%)20″ x 8.0-9.5″
255/40R2028″ (-2.1%)20″ x 8.5-10.0″
255/35R2128″ (-2.1%)21″ x 8.5-10.0″
295/30R2128″ (-2.1%)21″ x 10.0-11.0″
355/25R2128″ (-2.1%)21″ x 12.5-13.5″
345/40R1727.9″ (-2.5%)17″ x 11.5-13.5″
315/40R1827.9″ (-2.5%)18″ x 10.5-12.5″
155/65R2027.9″ (-2.5%)20″ x n/a
285/35R2027.9″ (-2.5%)20″ x 9.5-11.0″
335/30R2027.9″ (-2.5%)20″ x 11.5-12.5″
275/50R1727.8″ (-2.9%)17″ x 7.5-9.5″
305/45R1727.8″ (-2.9%)17″ x 9.5-11.5″
155/80R1827.8″ (-2.9%)18″ x n/a
165/60R2027.8″ (-2.9%)20″ x n/a
245/35R2127.8″ (-2.9%)21″ x 8.0-9.5″
245/35R2127.8″ (-2.9%)21″ x 8.0-9.0″

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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