# 2021 GMC Acadia Tire Size

Your GMC was manufactured with different tire sizes. To determine the best tire size for your specific 2021 GMC Acadia, we first need to determine your rim size. Please review the information below.

## How to Determine Rim Size

Check your existing tires. Your GMC Acadia'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 GMC Acadia

There are multiple tire sizes for your 2021 GMC Acadia 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 GMC Acadia.

Trim Options:

### SL

## 245/65R17 107

### Simplified Size: 245-65-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 GMC Acadia is **245/65R17 107H**. A color-coded explanation of the 2021 GMC Acadia's tire size is shown below.

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. | ||||||

107 | This tire has a load index of 107, which means it's capable of carrying a load of 2145 pounds (975 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

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 159 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 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:

### AT4

## 255/65R17 110

### Simplified Size: 255-65-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 GMC Acadia is **255/65R17 110S**. A color-coded explanation of the 2021 GMC Acadia's tire size is shown below.

255 | This number indicates that your tire has a width of 255 millimeters. | ||||||

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

110 | This tire has a load index of 110, which means it's capable of carrying a load of 2332 pounds (1060 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

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 165 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. |

## 18-Inch Rims

### 2021 GMC Acadia

The original tire size for your 2021 GMC Acadia is listed below. Tap on the box to view a color-coded explanation of your GMC Acadia's' tire size.

Trim Options:

### SLESLT

## 235/65R18 106

### Simplified Size: 235-65-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 GMC Acadia is **235/65R18 106H**. A color-coded explanation of the 2021 GMC Acadia's tire size is shown below.

235 | This number indicates that your tire has a width of 235 millimeters. | ||||||

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

106 | This tire has a load index of 106, which means it's capable of carrying a load of 2090 pounds (950 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

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

## 20-Inch Rims

### 2021 GMC Acadia

The original tire size for your 2021 GMC Acadia is listed below. Tap on the box to view a color-coded explanation of your GMC Acadia's' tire size.

Trim Options:

### AT4DenaliSLESLE Elevation EditionSLTSLT Elevation Edition

## 235/55R20 102

### Simplified Size: 235-55-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 GMC Acadia is **235/55R20 102H**. A color-coded explanation of the 2021 GMC Acadia's tire size is shown below.

235 | This number indicates that your tire has a width of 235 millimeters. | ||||||

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

102 | This tire has a load index of 102, which means it's capable of carrying a load of 1870 pounds (850 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

55 | This number means that your tire has an aspect ratio of 55%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 55% of the width. In this case, the sidewall height works out to be 129 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. |