Tire Size | Diameter | Rim (H x W) |
155/80R19 | 28.8″ (+2.8%) | 19″ x n/a |
245/35R22 | 28.8″ (+2.8%) | 22″ x 8.0-9.5″ |
225/55R19 | 28.7″ (+2.4%) | 19″ x 6.0-8.0″ |
275/45R19 | 28.7″ (+2.4%) | 19″ x 8.5-10.5″ |
245/45R20 | 28.7″ (+2.4%) | 20″ x 7.5-9.0″ |
275/40R20 | 28.7″ (+2.4%) | 20″ x 9.0-11.0″ |
315/35R20 | 28.7″ (+2.4%) | 20″ x 10.5-12.5″ |
245/40R21 | 28.7″ (+2.4%) | 21″ x 8.0-9.5″ |
325/30R21 | 28.7″ (+2.4%) | 21″ x 11.0-12.0″ |
285/30R22 | 28.7″ (+2.4%) | 22″ x 9.5-10.5″ |
245/50R19 | 28.6″ (+2.1%) | 19″ x 7.0-8.5″ |
275/35R21 | 28.6″ (+2.1%) | 21″ x 9.0-11.0″ |
335/25R22 | 28.6″ (+2.1%) | 22″ x 11.5-12.5″ |
345/35R19 | 28.5″ (+1.8%) | 19″ x 11.5-13.5″ |
275/30R22 | 28.5″ (+1.8%) | 22″ x 9.0-10.0″ |
265/45R19 | 28.4″ (+1.4%) | 19″ x 8.5-10.0″ |
305/35R20 | 28.4″ (+1.4%) | 20″ x 10.0-12.0″ |
315/30R21 | 28.4″ (+1.4%) | 21″ x 10.5-11.5″ |
235/50R19 | 28.3″ (+1.1%) | 19″ x 6.5-8.5″ |
295/40R19 | 28.3″ (+1.1%) | 19″ x 10.0-11.5″ |
235/45R20 | 28.3″ (+1.1%) | 20″ x 7.5-9.0″ |
265/40R20 | 28.3″ (+1.1%) | 20″ x 9.0-10.5″ |
265/35R21 | 28.3″ (+1.1%) | 21″ x 9.0-10.5″ |
265/30R22 | 28.3″ (+1.1%) | 22″ x 9.0-10.0″ |
305/30R21 | 28.2″ (+0.7%) | 21″ x 10.5-11.5″ |
315/25R22 | 28.2″ (+0.7%) | 22″ x 11.0-12.0″ |
265/25R23 | 28.2″ (+0.7%) | 23″ x 9.5-10.0″ |
145/80R19 | 28.1″ (+0.4%) | 19″ x n/a |
295/35R20 | 28.1″ (+0.4%) | 20″ x 10.0-11.5″ |
345/30R20 | 28.1″ (+0.4%) | 20″ x 12.0-13.0″ |
255/45R19 | 28″ (Equal) | 19″ x 8.0-9.5″ |
285/40R19 | 28″ (Equal) | 19″ x 9.5-11.0″ |
225/45R20 | 28″ (Equal) | 20″ x 8.0-9.5″ |
255/35R21 | 28″ (Equal) | 21″ x 8.5-10.0″ |
295/30R21 | 28″ (Equal) | 21″ x 10.0-11.0″ |
355/25R21 | 28″ (Equal) | 21″ x 12.5-13.5″ |
255/30R22 | 28″ (Equal) | 22″ x 8.5-9.5″ |
305/25R22 | 28″ (Equal) | 22″ x 10.5-11.5″ |
155/65R20 | 27.9″ (-0.4%) | 20″ x n/a |
285/35R20 | 27.9″ (-0.4%) | 20″ x 9.5-11.0″ |
335/30R20 | 27.9″ (-0.4%) | 20″ x 11.5-12.5″ |
165/60R20 | 27.8″ (-0.7%) | 20″ x n/a |
245/35R21 | 27.8″ (-0.7%) | 21″ x 8.0-9.5″ |
245/35R21 | 27.8″ (-0.7%) | 21″ x 8.0-9.0″ |
245/30R22 | 27.8″ (-0.7%) | 22″ x 8.0-9.0″ |
295/25R22 | 27.8″ (-0.7%) | 22″ x 10.0-11.0″ |
245/45R19 | 27.7″ (-1.1%) | 19″ x 7.5-9.0″ |
275/40R19 | 27.7″ (-1.1%) | 19″ x 9.0-11.0″ |
315/35R19 | 27.7″ (-1.1%) | 19″ x n/a |
195/50R20 | 27.7″ (-1.1%) | 20″ x 5.5-7.0″ |
245/40R20 | 27.7″ (-1.1%) | 20″ x 8.0-9.5″ |
325/30R20 | 27.7″ (-1.1%) | 20″ x 11.0-12.0″ |
285/30R21 | 27.7″ (-1.1%) | 21″ x 9.5-10.5″ |
175/55R20 | 27.6″ (-1.4%) | 20″ x 5.0-6.0″ |
215/45R20 | 27.6″ (-1.4%) | 20″ x 7.0-8.0″ |
275/35R20 | 27.6″ (-1.4%) | 20″ x 9.0-11.0″ |
235/30R22 | 27.6″ (-1.4%) | 22″ x 8.5″ |
285/25R22 | 27.6″ (-1.4%) | 22″ x 10.5″ |
155/70R19 | 27.5″ (-1.8%) | 19″ x 4.0-5.0″ |
215/50R19 | 27.5″ (-1.8%) | 19″ x 6.0-7.5″ |
235/35R21 | 27.5″ (-1.8%) | 21″ x n/a |
275/30R21 | 27.5″ (-1.8%) | 21″ x 9.0-10.0″ |
305/35R19 | 27.4″ (-2.2%) | 19″ x 10.0-12.0″ |
355/30R19 | 27.4″ (-2.2%) | 19″ x 12.0-13.0″ |
145/65R20 | 27.4″ (-2.2%) | 20″ x n/a |
235/40R20 | 27.4″ (-2.2%) | 20″ x 8.0-9.5″ |
315/30R20 | 27.4″ (-2.2%) | 20″ x 10.5-11.5″ |
325/25R21 | 27.4″ (-2.2%) | 21″ x 11.5-12.5″ |
275/25R22 | 27.4″ (-2.2%) | 22″ x 10.0″ |
175/60R19 | 27.3″ (-2.6%) | 19″ x 5.0-6.0″ |
235/45R19 | 27.3″ (-2.6%) | 19″ x 7.5-9.0″ |
265/40R19 | 27.3″ (-2.6%) | 19″ x 9.0-10.5″ |
155/60R20 | 27.3″ (-2.6%) | 20″ x 4.5-5.5″ |
265/35R20 | 27.3″ (-2.6%) | 20″ x 9.0-10.5″ |
265/30R21 | 27.3″ (-2.6%) | 21″ x 9.0-10.0″ |
225/30R22 | 27.3″ (-2.6%) | 22″ x n/a |
305/30R20 | 27.2″ (-2.9%) | 20″ x 10.5-11.5″ |
265/25R22 | 27.2″ (-2.9%) | 22″ x n/a |
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.
Inches | Millimeters | |
Tire Diameter | 28 | 712 |
Section Width | 10 | 255 |
Rim Height | 20 | 508 |
Sidewall Height | 4 | 102 |
Circumference | 88.1 | 2236.8 |



To easy understanding, let us break down each component of the 255/40R20 tire size to know what these numbers represent and how they may affect your vehicle's performance:
How tall 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.

How wide 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.

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.

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 rim 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.


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 plays a crucial role in your vehicle's overall performance, affecting its speedometer acceleration, accuracy and fuel efficiency.

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.

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. However, it should be considered as a general guideline, not a hard and fast rule. Here is a list of compatible tire sizes for 255/40R20:
More tire sizes for 20" Wheel:
26″ Tire Diameter
- 145/60R20 = 26.9x5.7R20
- 225/35R20 = 26.2x8.9R20
- 235/35R20 = 26.5x9.3R20
- 245/35R20 = 26.8x9.6R20
- 255/30R20 = 26.1x10R20
- 265/30R20 = 26.3x10.4R20
- 275/30R20 = 26.5x10.8R20
- 285/30R20 = 26.8x11.2R20
- 305/25R20 = 26x12R20
- 315/25R20 = 26.2x12.4R20
- 325/25R20 = 26.4x12.8R20
- 335/25R20 = 26.6x13.2R20
- 345/25R20 = 26.8x13.6R20
27″ Tire Diameter
- 145/65R20 = 27.4x5.7R20
- 155/60R20 = 27.3x6.1R20
- 165/60R20 = 27.8x6.5R20
- 175/55R20 = 27.6x6.9R20
- 195/50R20 = 27.7x7.7R20
- 215/45R20 = 27.6x8.5R20
- 225/40R20 = 27.1x8.9R20
- 235/40R20 = 27.4x9.3R20
- 245/40R20 = 27.7x9.6R20
- 255/35R20 = 27x10R20
- 265/35R20 = 27.3x10.4R20
- 275/35R20 = 27.6x10.8R20
- 285/35R20 = 27.9x11.2R20
- 295/30R20 = 27x11.6R20
- 305/30R20 = 27.2x12R20
- 315/30R20 = 27.5x12.4R20
- 325/30R20 = 27.7x12.8R20
- 335/30R20 = 28x13.2R20
*Disclaimer: The tire size is for information purposes only, the measurement is an approximation, as tire manufacturers can have slight variations in their measurements. It's recommended to refer to the vehicle manufacturer's guidelines or consult with a tire mechanic to determine the correct tire size for your vehicle.