# 2018 RAM 1500 Tire Size

Your RAM was manufactured with different tire sizes. To determine the best tire size for your specific 2018 RAM 1500, we first need to determine your rim size. Please review the information below.

## How to Determine Rim Size

Check your existing tires. Your RAM 1500'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 1500

There are multiple tire sizes for your 2018 RAM 1500 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 1500.

Trim Options:

### HarvestTradesman

## LT265/70R17/E 121

### Simplified Size: 265-70-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 1500 is **LT265/70R17/E 121R**. A color-coded explanation of the 2018 RAM 1500'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. |

Trim Options:

### HarvestTradesman

## LT265/70R17/E 121

### Simplified Size: 265-70-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 1500 is **LT265/70R17/E 121S**. A color-coded explanation of the 2018 RAM 1500'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 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:

### Rebel

## LT285/70R17/E 121

### Simplified Size: 285-70-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 1500 is **LT285/70R17/E 121S**. A color-coded explanation of the 2018 RAM 1500'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. | ||||||

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 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.
| ||||||

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:

### Big HornExpressHarvestLaramieLone StarTradesman

## P265/70R17 113

### Simplified Size: 265-70-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 1500 is **P265/70R17 113R**. A color-coded explanation of the 2018 RAM 1500's tire size is shown below.

P | 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. | ||||||

113 | This tire has a load index of 113, which means it's capable of carrying a load of 2530 pounds (1150 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

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 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. |

## 20-Inch Rims

### 2018 RAM 1500

There are multiple tire sizes for your 2018 RAM 1500 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 1500.

Trim Options:

### Harvest

## P275/60R20 114

### Simplified Size: 275-60-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 1500 is **P275/60R20 114H**. A color-coded explanation of the 2018 RAM 1500's tire size is shown below.

P | 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. | ||||||

114 | This tire has a load index of 114, which means it's capable of carrying a load of 2596 pounds (1180 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

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 165 millimeters. | ||||||

R |
| ||||||

This tire has a speed rating of H, which means 130 mph (210 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

Trim Options:

### Big HornExpressHarvestLaramieLaramie LonghornLimitedLimited Tungsten EditionLone StarSport

## P275/60R20 114

### Simplified Size: 275-60-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 1500 is **P275/60R20 114S**. A color-coded explanation of the 2018 RAM 1500's tire size is shown below.

P | 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. | ||||||

114 | This tire has a load index of 114, which means it's capable of carrying a load of 2596 pounds (1180 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

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 165 millimeters. | ||||||

R |
| ||||||

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. |

## 22-Inch Rims

### 2018 RAM 1500

The original tire size for your 2018 RAM 1500 is listed below. Tap on the box to view a color-coded explanation of your RAM 1500's' tire size.

Trim Options:

### Sport Reg. Cab

## 285/45R22/XL 114

### Simplified Size: 285-45-22

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 RAM 1500 is **285/45R22/XL 114H**. A color-coded explanation of the 2018 RAM 1500's tire size is shown below.

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

22 | The tire size was designed to fit rims or wheels that are 22 inches in diameter. | ||||||

XL | The mark of XL means extra load. A tire with this designation can handle higher inflation pressures than a regular tire, which increases its maximum load. | ||||||

114 | This tire has a load index of 114, which means it's capable of carrying a load of 2596 pounds (1180 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

45 | This number means that your tire has an aspect ratio of 45%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 45% of the width. In this case, the sidewall height works out to be 128 millimeters. | ||||||

R |
| ||||||

This tire has a speed rating of H, which means 130 mph (210 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |