# 2021 Ford F-250 Super Duty Tire Size

Your Ford was manufactured with different tire sizes. To determine the best tire size for your specific 2021 Ford F-250 Super Duty, we first need to determine your rim size. Please review the information below.

## How to Determine Rim Size

Check your existing tires. Your Ford F-250 Super Duty's rim size is the number to the right of the R. In the example pictured here, the tire size fits 16-inch rims.

## Rim Size Selection

Now that you know your rim size, make a selection below to filter your results.

## 17-Inch Rims

### 2021 Ford F-250 Super Duty

Your 2021 Ford F-250 Super Duty was manufactured with multiple tire sizes. Choose a tire size below to get a color-coded explanation of the differences. Then pick the best tire size for your 2021 Ford F-250 Super Duty.

Trim Options:

### XL 4x2XL 4x4

## LT245/75R17/E 121

### Simplified Size: 245-75-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 Ford F-250 Super Duty is **LT245/75R17/E 121R**. A color-coded explanation of the 2021 Ford F-250 Super Duty's tire size is shown below.

LT | This letter denotes the intended use of the tire.
| ||||||

245 | This number indicates that your tire has a width of 245 millimeters. | ||||||

17 | The tire size was designed to fit rims or wheels that are 17 inches in diameter. | ||||||

121 | This tire has a load index of 121, which means it's capable of carrying a load of 3190 pounds (1450 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

E | The mark of E denotes your tire's load range, or ply rating. A load range of E means that the tire has a ply rating of 10. Letters further along in the alphabet represent stronger tires that can sustain higher inflation pressures. Tires with higher inflation pressures can carry heavier loads. | ||||||

75 | This number means that your tire has an aspect ratio of 75%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 75% of the width. In this case, the sidewall height works out to be 183 millimeters. | ||||||

R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
| ||||||

This tire has a speed rating of R, which means 105 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

Trim Options:

### XL 4x2XL 4x4

## LT265/70R17/E 121

### Simplified Size: 265-70-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 Ford F-250 Super Duty is **LT265/70R17/E 121R**. A color-coded explanation of the 2021 Ford F-250 Super Duty's tire size is shown below.

LT | This letter denotes the intended use of the tire.
| ||||||

265 | This number indicates that your tire has a width of 265 millimeters. | ||||||

17 | The tire size was designed to fit rims or wheels that are 17 inches in diameter. | ||||||

121 | This tire has a load index of 121, which means it's capable of carrying a load of 3190 pounds (1450 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

E | The mark of E denotes your tire's load range, or ply rating. A load range of E means that the tire has a ply rating of 10. Letters further along in the alphabet represent stronger tires that can sustain higher inflation pressures. Tires with higher inflation pressures can carry heavier loads. | ||||||

70 | This number means that your tire has an aspect ratio of 70%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width. In this case, the sidewall height works out to be 185 millimeters. | ||||||

R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
| ||||||

This tire has a speed rating of R, which means 105 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

## 18-Inch Rims

### 2021 Ford F-250 Super Duty

There are multiple tire sizes for your 2021 Ford F-250 Super Duty that depend upon the trim level. Look for your trim level below to get a color-coded explanation of your tire size. Then pick the best tire size for your 2021 Ford F-250 Super Duty.

Trim Options:

### King Ranch 4x2King Ranch 4x4Lariat 4x2Lariat 4x4XL 4x2XL 4x4XLT 4x2XLT 4x4

## LT275/65R18/E 123

### Simplified Size: 275-65-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 Ford F-250 Super Duty is **LT275/65R18/E 123S**. A color-coded explanation of the 2021 Ford F-250 Super Duty's tire size is shown below.

LT | This letter denotes the intended use of the tire.
| ||||||

275 | This number indicates that your tire has a width of 275 millimeters. | ||||||

18 | The tire size was designed to fit rims or wheels that are 18 inches in diameter. | ||||||

123 | This tire has a load index of 123, which means it's capable of carrying a load of 3410 pounds (1550 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

E | The mark of E denotes your tire's load range, or ply rating. A load range of E means that the tire has a ply rating of 10. Letters further along in the alphabet represent stronger tires that can sustain higher inflation pressures. Tires with higher inflation pressures can carry heavier loads. | ||||||

65 | This number means that your tire has an aspect ratio of 65%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 65% of the width. In this case, the sidewall height works out to be 178 millimeters. | ||||||

R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
| ||||||

This tire has a speed rating of S, which means 111 mph (180 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

Trim Options:

### King Ranch 4x4Lariat 4x4XL 4x4XLT 4x4

## LT275/70R18/E 125

### Simplified Size: 275-70-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 Ford F-250 Super Duty is **LT275/70R18/E 125R**. A color-coded explanation of the 2021 Ford F-250 Super Duty's tire size is shown below.

LT | This letter denotes the intended use of the tire.
| ||||||

275 | This number indicates that your tire has a width of 275 millimeters. | ||||||

18 | The tire size was designed to fit rims or wheels that are 18 inches in diameter. | ||||||

125 | This tire has a load index of 125, which means it's capable of carrying a load of 3630 pounds (1650 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

E | |||||||

70 | This number means that your tire has an aspect ratio of 70%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 70% of the width. In this case, the sidewall height works out to be 192 millimeters. | ||||||

R |
| ||||||

This tire has a speed rating of R, which means 105 mph (170 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

Trim Options:

### King Ranch w/Tremor Off-Road Pkg.Lariat w/Tremor Off-Road Pkg.Platinum w/Tremor Off-Road Pkg.XLT w/Tremor Off-Road Pkg.

## LT285/75R18/E 129

### Simplified Size: 285-75-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 Ford F-250 Super Duty is **LT285/75R18/E 129Q**. A color-coded explanation of the 2021 Ford F-250 Super Duty's tire size is shown below.

LT | This letter denotes the intended use of the tire.
| ||||||

285 | This number indicates that your tire has a width of 285 millimeters. | ||||||

18 | The tire size was designed to fit rims or wheels that are 18 inches in diameter. | ||||||

129 | This tire has a load index of 129, which means it's capable of carrying a load of NaN pounds (undefined kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

E | |||||||

75 | This number means that your tire has an aspect ratio of 75%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 75% of the width. In this case, the sidewall height works out to be 213 millimeters. | ||||||

R |
| ||||||

This tire has a speed rating of Q, which means 99 mph (160 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

## 20-Inch Rims

### 2021 Ford F-250 Super Duty

The original tire size for your 2021 Ford F-250 Super Duty is listed below. Tap on the box to view a color-coded explanation of your Ford F-250 Super Duty's' tire size.

Trim Options:

### King Ranch 4x2King Ranch 4x4Lariat 4x2Lariat 4x4LimitedPlatinum

## LT275/65R20/E 126

### Simplified Size: 275-65-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 Ford F-250 Super Duty is **LT275/65R20/E 126R**. A color-coded explanation of the 2021 Ford F-250 Super Duty's tire size is shown below.

LT | This letter denotes the intended use of the tire.
| ||||||

275 | This number indicates that your tire has a width of 275 millimeters. | ||||||

20 | The tire size was designed to fit rims or wheels that are 20 inches in diameter. | ||||||

126 | This tire has a load index of 126, which means it's capable of carrying a load of NaN pounds (undefined kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

E | |||||||

65 | This number means that your tire has an aspect ratio of 65%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 65% of the width. In this case, the sidewall height works out to be 178 millimeters. | ||||||

R |
| ||||||