265/40R21 In Inches – Tire Size & Wheel Fitment Guide

What size tire is 265/40R21 in Inches?

The 265/40R21 tire has an overall diameter of 29.3 inches, a section width of 10.4 inches, and can be mounted on 21 x 9.0-10.5 inches rim. The equivalent tire size in the high flotation system is 29.3x10.4R21.

Tire Diameter29.3745.4
Section Width10.4265
Rim Height21533
Sidewall Height4.2106
tire diameter
Tire Side
Tire Circumference
687.2 Revs/Mile

To help you understand, we'll break down each part of the 265/40R21 tire size to know what these numbers represent & how they may affect your tire's performance:

How wide is a 265/40R21 tire?

The 265/40R21 tire has a width of 10.4 inches (265 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: 10.4 In.

How tall is a 265/40R21 tire?

The 265/40R21 tire has a height of 29.3 inches (745.4 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: 29.3 In.

265/40R21 sidewall height

The 265/40R21 has a sidewall height of 4.2 inches (106 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: 4.2 In.

What size rim do you need for 265/40R21 tire?

You can mount the 265/40R21 tire on a rim with a height of 21 inches and a width ranging from 9.0-10.5 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: 21 In.
rim width
Rim width: 9.0-10.5 In.

265/40R21 circumference

The 265/40R21 tire has a circumference of 92.2 inches (2341.7 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: 92.2 In.

265/40R21 Revolutions

The 265/40R21 performs 687.2 revs/mile. Revolutions per mile indicate the number of times a tire rotates while it covers the distance of one mile.

687.2 revs/mile

Replacement Tire Sizes for 265/40R21

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 265/40R21:

Tire SizeDiameterRim (H x W)
235/55R2030.2″ (+3%)20″ x 6.5-8.5″
285/45R2030.1″ (+2.7%)20″ x 9.0-10.5″
295/35R2230.1″ (+2.7%)22″ x 10.0-11.5″
255/50R2030″ (+2.3%)20″ x 7.0-9.0″
255/45R2130″ (+2.3%)21″ x 9.5-11.0″
285/40R2130″ (+2.3%)21″ x 9.5-11.0″
255/40R2230″ (+2.3%)22″ x 8.5-10.0″
295/30R2330″ (+2.3%)23″ x 10.0-11.0″
255/30R2430″ (+2.3%)24″ x 8.5-9.5″
285/35R2229.9″ (+2%)22″ x 9.5-11.0″
245/30R2429.8″ (+1.7%)24″ x n/a
275/45R2029.7″ (+1.3%)20″ x 8.5-10.5″
245/45R2129.7″ (+1.3%)21″ x 7.5-9.0″
275/40R2129.7″ (+1.3%)21″ x 9.0-11.0″
315/35R2129.7″ (+1.3%)21″ x 10.5-12.5″
245/50R2029.6″ (+1%)20″ x 7.0-8.5″
305/40R2029.6″ (+1%)20″ x 10.0-12.0″
275/35R2229.6″ (+1%)22″ x 9.0-11.0″
265/45R2029.4″ (+0.3%)20″ x 8.5-10.0″
305/35R2129.4″ (+0.3%)21″ x 10.0-12.0″
315/30R2229.4″ (+0.3%)22″ x 10.5-11.5″
275/25R2429.4″ (+0.3%)24″ x 9.5-10.0″
235/50R2029.3″ (Equal)20″ x 6.5-8.5″
295/40R2029.3″ (Equal)20″ x 10.0-11.5″
235/45R2129.3″ (Equal)21″ x 7.5-9.0″
265/35R2229.3″ (Equal)22″ x 9.0-10.5″
305/30R2229.2″ (-0.3%)22″ x 10.5-11.5″
315/25R2329.2″ (-0.3%)23″ x 11.0-12.0″
265/25R2429.2″ (-0.3%)24″ x n/a
145/80R2029.1″ (-0.7%)20″ x n/a
295/35R2129.1″ (-0.7%)21″ x 10.0-11.5″
255/45R2029″ (-1%)20″ x 8.0-9.5″
285/40R2029″ (-1%)20″ x 9.5-11.0″
325/35R2029″ (-1%)20″ x 11.0-13.0″
255/40R2129″ (-1%)21″ x 8.5-10.0″
255/35R2229″ (-1%)22″ x 8.5-10.0″
295/30R2229″ (-1%)22″ x 10.0-11.0″
305/25R2329″ (-1%)23″ x 10.5-11.5″
255/25R2429″ (-1%)24″ x n/a
285/35R2128.9″ (-1.4%)21″ x 9.5-11.0″
245/35R2228.8″ (-1.7%)22″ x 8.0-9.5″
245/25R2428.8″ (-1.7%)24″ x n/a
245/45R2028.7″ (-2.1%)20″ x 7.5-9.0″
275/40R2028.7″ (-2.1%)20″ x 9.0-11.0″
315/35R2028.7″ (-2.1%)20″ x 10.5-12.5″
245/40R2128.7″ (-2.1%)21″ x 8.0-9.5″
325/30R2128.7″ (-2.1%)21″ x 11.0-12.0″
285/30R2228.7″ (-2.1%)22″ x 9.5-10.5″
275/35R2128.6″ (-2.4%)21″ x 9.0-11.0″
335/25R2228.6″ (-2.4%)22″ x 11.5-12.5″
275/30R2228.5″ (-2.8%)22″ x 9.0-10.0″

*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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More tire sizes for 21" Wheel:

26″ Tire Diameter

27″ Tire Diameter

28″ Tire Diameter

29″ Tire Diameter

30″ Tire Diameter

31″ Tire Diameter

32″ Tire Diameter

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