# 2018 RAM 2500 Tire Size

Your RAM was manufactured with different tire sizes. To determine the best tire size for your specific 2018 RAM 2500, we first need to determine your rim size. Please review the information below.

## How to Determine Rim Size

Check your existing tires. Your RAM 2500'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

### 2018 RAM 2500

There are multiple tire sizes for your 2018 RAM 2500 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 2018 RAM 2500.

Trim Options:

### Tradesman

## LT245/70R17/E 119

### Simplified Size: 245-70-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 2500 is **LT245/70R17/E 119R**. A color-coded explanation of the 2018 RAM 2500'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. | ||||||

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 171 millimeters. | ||||||

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

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

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. | ||||||

119 | This tire has a load index of 119, which means it's capable of carrying a load of 2992 pounds (1360 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

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:

### Power Wagon

## LT285/70R17/D 121

### Simplified Size: 285-70-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 2500 is **LT285/70R17/D 121Q**. A color-coded explanation of the 2018 RAM 2500'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. | ||||||

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 199 millimeters. | ||||||

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

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

D | The mark of D denotes your tire's load range, or ply rating. A load range of D means that the tire has a ply rating of 8. Letters further along in the alphabet represent stronger tires that can sustain higher inflation pressures. Tires with higher inflation pressures can carry heavier loads. | ||||||

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. | ||||||

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. |

## 18-Inch Rims

### 2018 RAM 2500

Your 2018 RAM 2500 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 2018 RAM 2500.

Trim Options:

### Big HornLaramieLaramie LonghornSLTTradesman

## LT275/70R18/E 125

### Simplified Size: 275-70-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 2500 is **LT275/70R18/E 125R**. A color-coded explanation of the 2018 RAM 2500'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. | ||||||

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

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

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. | ||||||

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. | ||||||

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:

### Big HornLaramieLaramie LonghornSLTTradesman

## LT275/70R18/E 125

### Simplified Size: 275-70-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 2500 is **LT275/70R18/E 125S**. A color-coded explanation of the 2018 RAM 2500'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. | ||||||

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 |
| ||||||

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

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. | ||||||

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. | ||||||

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. |

## 20-Inch Rims

### 2018 RAM 2500

The original tire size for your 2018 RAM 2500 is listed below. Tap on the box to view a color-coded explanation of your RAM 2500's' tire size.

Trim Options:

### Big HornLaramieLaramie LonghornLimitedSLT

## LT285/60R20/E 125

### Simplified Size: 285-60-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 2500 is **LT285/60R20/E 125R**. A color-coded explanation of the 2018 RAM 2500'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. | ||||||

60 | This number means that your tire has an aspect ratio of 60%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 60% of the width. In this case, the sidewall height works out to be 171 millimeters. | ||||||

R |
| ||||||

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

E | |||||||

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. | ||||||

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. |