255/40R20 In Inches – Tire Size & Wheel Fitment Guide


What size tire is 255/40R20 in Inches?

The 255/40R20 tire has an overall diameter of 28 inches, a section width of 10 inches, and can be mounted on 20 x 8.5-10.0 inches rim. The equivalent tire size in the high flotation system is 28x10R20.

InchesMillimeters
Tire Diameter28712
Section Width10255
Rim Height20508
Sidewall Height4102
Circumference88.12236.8
tire diameter
10"
28"
Tire Side
Tire Circumference
88.1"
20"
4"
719.5 Revs/Mile

To help you understand, we'll break down each part of the 255/40R20 tire size to know what these numbers represent & how they may affect your tire's performance:



How wide is a 255/40R20 tire?

The 255/40R20 tire has a width of 10 inches (255 mm). This is the measurement at its thickest point, the distance between the outer sidewall and the inner sidewall’s widest point, also called as tread width or section width.

tread width
Tread width: 10 In.


How tall is a 255/40R20 tire?

The 255/40R20 tire has a height of 28 inches (712 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 unloaded.

Tire Diameter
Tire diameter: 28 In.


255/40R20 sidewall height

The 255/40R20 has a sidewall height of 4 inches (102 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: 4 In.


What size rim do you need for 255/40R20 tire?

You can mount the 255/40R20 tire on a rim with a height of 20 inches and a width ranging from 8.5-10.0 inches. (Based on recommendations of The Tire and Rim Association (TRA))

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

Rim Diameter
Rim height: 20 In.
rim width
Rim width: 8.5-10.0 In.


255/40R20 circumference

The 255/40R20 tire has a circumference of 88.1 inches (2236.8 mm), This is the measurement of the distance the tire travels in one revolution.

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

Circumference
Circumference: 88.1 In.


255/40R20 Revolutions

The 255/40R20 performs 719.5 revs/mile. Revolutions per mile indicate the number of times a tire rotates while it covers the distance of one mile.

Revolutions
719.5 revs/mile


Replacement Tire Sizes for 255/40R20

As a rule, you can replace the tire within a 3% difference in tire diameter (height) of the OEM tire size. Here is a list of compatible tire sizes for 255/40R20:

Tire SizeDiameterRim (H x W)
155/80R1928.8″ (+2.8%)19″ x n/a
245/35R2228.8″ (+2.8%)22″ x 8.0-9.5″
225/55R1928.7″ (+2.4%)19″ x 6.0-8.0″
275/45R1928.7″ (+2.4%)19″ x 8.5-10.5″
245/45R2028.7″ (+2.4%)20″ x 7.5-9.0″
275/40R2028.7″ (+2.4%)20″ x 9.0-11.0″
315/35R2028.7″ (+2.4%)20″ x 10.5-12.5″
245/40R2128.7″ (+2.4%)21″ x 8.0-9.5″
325/30R2128.7″ (+2.4%)21″ x 11.0-12.0″
285/30R2228.7″ (+2.4%)22″ x 9.5-10.5″
245/50R1928.6″ (+2.1%)19″ x 7.0-8.5″
275/35R2128.6″ (+2.1%)21″ x 9.0-11.0″
335/25R2228.6″ (+2.1%)22″ x 11.5-12.5″
345/35R1928.5″ (+1.8%)19″ x 11.5-13.5″
275/30R2228.5″ (+1.8%)22″ x 9.0-10.0″
265/45R1928.4″ (+1.4%)19″ x 8.5-10.0″
305/35R2028.4″ (+1.4%)20″ x 10.0-12.0″
315/30R2128.4″ (+1.4%)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″
265/30R2228.3″ (+1.1%)22″ x 9.0-10.0″
305/30R2128.2″ (+0.7%)21″ x 10.5-11.5″
315/25R2228.2″ (+0.7%)22″ x 11.0-12.0″
265/25R2328.2″ (+0.7%)23″ x 9.5-10.0″
145/80R1928.1″ (+0.4%)19″ x n/a
295/35R2028.1″ (+0.4%)20″ x 10.0-11.5″
345/30R2028.1″ (+0.4%)20″ x 12.0-13.0″
255/45R1928″ (Equal)19″ x 8.0-9.5″
285/40R1928″ (Equal)19″ x 9.5-11.0″
225/45R2028″ (Equal)20″ x 8.0-9.5″
255/35R2128″ (Equal)21″ x 8.5-10.0″
295/30R2128″ (Equal)21″ x 10.0-11.0″
355/25R2128″ (Equal)21″ x 12.5-13.5″
255/30R2228″ (Equal)22″ x 8.5-9.5″
305/25R2228″ (Equal)22″ x 10.5-11.5″
155/65R2027.9″ (-0.4%)20″ x n/a
285/35R2027.9″ (-0.4%)20″ x 9.5-11.0″
335/30R2027.9″ (-0.4%)20″ x 11.5-12.5″
165/60R2027.8″ (-0.7%)20″ x n/a
245/35R2127.8″ (-0.7%)21″ x 8.0-9.5″
245/35R2127.8″ (-0.7%)21″ x 8.0-9.0″
245/30R2227.8″ (-0.7%)22″ x 8.0-9.0″
295/25R2227.8″ (-0.7%)22″ x 10.0-11.0″
245/45R1927.7″ (-1.1%)19″ x 7.5-9.0″
275/40R1927.7″ (-1.1%)19″ x 9.0-11.0″
315/35R1927.7″ (-1.1%)19″ x n/a
195/50R2027.7″ (-1.1%)20″ x 5.5-7.0″
245/40R2027.7″ (-1.1%)20″ x 8.0-9.5″
325/30R2027.7″ (-1.1%)20″ x 11.0-12.0″
285/30R2127.7″ (-1.1%)21″ x 9.5-10.5″
175/55R2027.6″ (-1.4%)20″ x 5.0-6.0″
215/45R2027.6″ (-1.4%)20″ x 7.0-8.0″
275/35R2027.6″ (-1.4%)20″ x 9.0-11.0″
235/30R2227.6″ (-1.4%)22″ x 8.5″
285/25R2227.6″ (-1.4%)22″ x 10.5″
155/70R1927.5″ (-1.8%)19″ x 4.0-5.0″
215/50R1927.5″ (-1.8%)19″ x 6.0-7.5″
235/35R2127.5″ (-1.8%)21″ x n/a
275/30R2127.5″ (-1.8%)21″ x 9.0-10.0″
305/35R1927.4″ (-2.2%)19″ x 10.0-12.0″
355/30R1927.4″ (-2.2%)19″ x 12.0-13.0″
145/65R2027.4″ (-2.2%)20″ x n/a
235/40R2027.4″ (-2.2%)20″ x 8.0-9.5″
315/30R2027.4″ (-2.2%)20″ x 10.5-11.5″
325/25R2127.4″ (-2.2%)21″ x 11.5-12.5″
275/25R2227.4″ (-2.2%)22″ x 10.0″
175/60R1927.3″ (-2.6%)19″ x 5.0-6.0″
235/45R1927.3″ (-2.6%)19″ x 7.5-9.0″
265/40R1927.3″ (-2.6%)19″ x 9.0-10.5″
155/60R2027.3″ (-2.6%)20″ x 4.5-5.5″
265/35R2027.3″ (-2.6%)20″ x 9.0-10.5″
265/30R2127.3″ (-2.6%)21″ x 9.0-10.0″
225/30R2227.3″ (-2.6%)22″ x n/a
305/30R2027.2″ (-2.9%)20″ x 10.5-11.5″
265/25R2227.2″ (-2.9%)22″ x n/a

More tire sizes for 20" Wheel:

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

37″ Tire Diameter

39″ 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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