| Tire Size | Diameter | Rim (H x W) |
| 275/50R18 | 28.8″ (+2.8%) | 18″ x 7.5-9.5″ |
| 305/45R18 | 28.8″ (+2.8%) | 18″ x 9.5-11.5″ |
| 155/80R19 | 28.8″ (+2.8%) | 19″ x n/a |
| 165/90R17 | 28.7″ (+2.4%) | 17″ x n/a |
| 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″ |
| 245/60R17 | 28.6″ (+2.1%) | 17″ x 7.0-8.5″ |
| 225/60R18 | 28.6″ (+2.1%) | 18″ x 6.0-8.0″ |
| 245/55R18 | 28.6″ (+2.1%) | 18″ x 7.0-8.5″ |
| 245/50R19 | 28.6″ (+2.1%) | 19″ x 7.0-8.5″ |
| 275/35R21 | 28.6″ (+2.1%) | 21″ x 9.0-11.0″ |
| 225/65R17 | 28.5″ (+1.8%) | 17″ x 6.0-8.0″ |
| 265/55R17 | 28.5″ (+1.8%) | 17″ x 7.5-9.5″ |
| 295/45R18 | 28.5″ (+1.8%) | 18″ x 9.5-11.0″ |
| 345/35R19 | 28.5″ (+1.8%) | 19″ x 11.5-13.5″ |
| 155/85R18 | 28.4″ (+1.4%) | 18″ x n/a |
| 265/50R18 | 28.4″ (+1.4%) | 18″ x 7.5-9.5″ |
| 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″ |
| 315/45R17 | 28.2″ (+0.7%) | 17″ x 10.0-12.0″ |
| 235/55R18 | 28.2″ (+0.7%) | 18″ x 6.5-8.5″ |
| 305/30R21 | 28.2″ (+0.7%) | 21″ x 10.5-11.5″ |
| 235/60R17 | 28.1″ (+0.4%) | 17″ x 6.5-8.5″ |
| 285/45R18 | 28.1″ (+0.4%) | 18″ x 9.0-10.5″ |
| 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″ |
| 155/90R17 | 28″ (Equal) | 17″ x n/a |
| 215/65R17 | 28″ (Equal) | 17″ x 6.0-7.5″ |
| 255/55R17 | 28″ (Equal) | 17″ x 7.0-9.0″ |
| 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″ |
| 255/40R20 | 28″ (Equal) | 20″ x 8.5-10.0″ |
| 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″ |
| 345/40R17 | 27.9″ (-0.4%) | 17″ x 11.5-13.5″ |
| 315/40R18 | 27.9″ (-0.4%) | 18″ x 10.5-12.5″ |
| 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″ |
| 275/50R17 | 27.8″ (-0.7%) | 17″ x 7.5-9.5″ |
| 305/45R17 | 27.8″ (-0.7%) | 17″ x 9.5-11.5″ |
| 155/80R18 | 27.8″ (-0.7%) | 18″ x n/a |
| 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″ |
| 145/85R18 | 27.7″ (-1.1%) | 18″ x n/a |
| 205/60R18 | 27.7″ (-1.1%) | 18″ x 5.0-7.5″ |
| 225/55R18 | 27.7″ (-1.1%) | 18″ x 6.0-8.0″ |
| 275/45R18 | 27.7″ (-1.1%) | 18″ x 8.5-10.5″ |
| 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″ |
| 225/60R17 | 27.6″ (-1.4%) | 17″ x 6.0-8.0″ |
| 245/55R17 | 27.6″ (-1.4%) | 17″ x 7.0-8.5″ |
| 245/50R18 | 27.6″ (-1.4%) | 18″ x 7.0-8.5″ |
| 305/40R18 | 27.6″ (-1.4%) | 18″ x 10.0-12.0″ |
| 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″ |
| 205/65R17 | 27.5″ (-1.8%) | 17″ x 5.5-7.5″ |
| 295/45R17 | 27.5″ (-1.8%) | 17″ x n/a |
| 345/35R18 | 27.5″ (-1.8%) | 18″ x 11.5-13.5″ |
| 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″ |
| 165/80R17 | 27.4″ (-2.2%) | 17″ x n/a |
| 265/45R18 | 27.4″ (-2.2%) | 18″ x 8.5-10.0″ |
| 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″ |
| 145/90R17 | 27.3″ (-2.6%) | 17″ x n/a |
| 215/55R18 | 27.3″ (-2.6%) | 18″ x 6.0-7.5″ |
| 235/50R18 | 27.3″ (-2.6%) | 18″ x 6.5-8.5″ |
| 295/40R18 | 27.3″ (-2.6%) | 18″ x 10.0-11.5″ |
| 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″ |
| 215/60R17 | 27.2″ (-2.9%) | 17″ x 6.0-7.5″ |
| 235/55R17 | 27.2″ (-2.9%) | 17″ x 6.5-8.5″ |
| 335/35R18 | 27.2″ (-2.9%) | 18″ x n/a |
| 305/30R20 | 27.2″ (-2.9%) | 20″ x 10.5-11.5″ |
255/50R18 In Inches – Tire Size & Wheel Fitment Guide
What size tire is 255/50R18 in Inches?
The 255/50R18 tire has an overall diameter of 28 inches, a section width of 10 inches, and can be mounted on 18 x 7.0-9.0 inches rim. The equivalent tire size in the high flotation system is 28x10R18.
| Inches | Millimeters | |
| Tire Diameter | 28 | 712.2 |
| Section Width | 10 | 255 |
| Rim Height | 18 | 457 |
| Sidewall Height | 5 | 127.5 |
| Circumference | 88.1 | 2237.4 |
10"
28"
88.1"
18"
5"
719.3 Revs/Mile
To help you understand, we'll break down each part of the 255/50R18 tire size to know what these numbers represent & how they may affect your tire's performance:
How wide is a 255/50R18 tire?
The 255/50R18 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 tall is a 255/50R18 tire?
The 255/50R18 tire has a height of 28 inches (712.2 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.
255/50R18 sidewall height
The 255/50R18 has a sidewall height of 5 inches (127.5 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 255/50R18 tire?
You can mount the 255/50R18 tire on a rim with a height of 18 inches and a width ranging from 7.0-9.0 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.
255/50R18 circumference
The 255/50R18 tire has a circumference of 88.1 inches (2237.4 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.
255/50R18 Revolutions
The 255/50R18 performs 719.3 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 255/50R18
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 255/50R18:
More tire sizes for 18" Wheel:
25″ Tire Diameter
- 135/70R18 = 25.5x5.3R18
- 145/65R18 = 25.4x5.7R18
- 155/60R18 = 25.3x6.1R18
- 205/45R18 = 25.2x8.1R18
- 215/45R18 = 25.6x8.5R18
- 225/40R18 = 25.1x8.9R18
- 235/40R18 = 25.4x9.3R18
- 245/40R18 = 25.7x9.6R18
- 255/35R18 = 25x10R18
- 265/35R18 = 25.3x10.4R18
- 275/35R18 = 25.6x10.8R18
- 285/35R18 = 25.9x11.2R18
- 295/30R18 = 25x11.6R18
- 305/30R18 = 25.2x12R18
- 315/30R18 = 25.5x12.4R18
- 335/30R18 = 25.9x13.2R18
26″ Tire Diameter
- 135/80R18 = 26.5x5.3R18
- 145/70R18 = 26x5.7R18
- 155/70R18 = 26.6x6.1R18
- 185/55R18 = 26x7.3R18
- 205/50R18 = 26.1x8.1R18
- 205/55R18 = 26.9x8.1R18
- 215/50R18 = 26.5x8.5R18
- 225/45R18 = 25.9x8.9R18
- 225/50R18 = 26.9x8.9R18
- 235/45R18 = 26.3x9.3R18
- 245/45R18 = 26.7x9.6R18
- 255/40R18 = 26x10R18
- 275/40R18 = 26.7x10.8R18
- 295/35R18 = 26.1x11.6R18
- 305/35R18 = 26.4x12R18
- 315/35R18 = 26.7x12.4R18
- 345/30R18 = 26.2x13.6R18
27″ Tire Diameter
- 145/80R18 = 27.1x5.7R18
- 145/85R18 = 27.7x5.7R18
- 155/80R18 = 27.8x6.1R18
- 165/70R18 = 27.1x6.5R18
- 205/60R18 = 27.7x8.1R18
- 215/55R18 = 27.3x8.5R18
- 225/55R18 = 27.8x8.9R18
- 235/50R18 = 27.3x9.3R18
- 245/50R18 = 27.7x9.6R18
- 255/45R18 = 27x10R18
- 265/45R18 = 27.4x10.4R18
- 275/45R18 = 27.8x10.8R18
- 285/40R18 = 27x11.2R18
- 295/40R18 = 27.3x11.6R18
- 305/40R18 = 27.6x12R18
- 315/40R18 = 27.9x12.4R18
- 325/35R18 = 27x12.8R18
- 335/35R18 = 27.2x13.2R18
- 345/35R18 = 27.5x13.6R18
38″ Tire Diameter
- 395/65R18 = 38.2x15.6R18
*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.