# 2021 Mercedes-Benz GLS450 Tire Size

Your Mercedes-Benz was manufactured with different tire sizes. To determine the best tire size for your specific 2021 Mercedes-Benz GLS450, we first need to determine your rim size. Please review the information below.

## How to Determine Rim Size

Check your existing tires. Your Mercedes-Benz GLS450'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.

## 20-Inch Rims

### 2021 Mercedes-Benz GLS450

The original tire size for your 2021 Mercedes-Benz GLS450 is listed below. Tap on the box to view a color-coded explanation of your Mercedes-Benz GLS450's' tire size.

Trim Options:

### 4Matic

## 275/50R20 109

### Simplified Size: 275-50-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 Mercedes-Benz GLS450 is **275/50R20 109H**. A color-coded explanation of the 2021 Mercedes-Benz GLS450's tire size is shown below.

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. | ||||||

109 | This tire has a load index of 109, which means it's capable of carrying a load of 2266 pounds (1030 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

50 | This number means that your tire has an aspect ratio of 50%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 50% of the width. In this case, the sidewall height works out to be 137 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. |

## 21-Inch Rims

### 2021 Mercedes-Benz GLS450

The original tire size for your 2021 Mercedes-Benz GLS450 is listed below. Tap on the box to view a color-coded explanation of your Mercedes-Benz GLS450's' tire size.

Trim Options:

### 4Matic

## 315/40R21 111(Rear)

### Simplified Size: 275-45-21

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 Mercedes-Benz GLS450 is **275/45R21 107H (Front)**. A color-coded explanation of the 2021 Mercedes-Benz GLS450's tire size is shown below.

315 | This number indicates that your tire has a width of 315 millimeters. | ||||||

21 | The tire size was designed to fit rims or wheels that are 21 inches in diameter. | ||||||

111 | This tire has a load index of 111, which means it's capable of carrying a load of 2398 pounds (1090 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

40 | This number means that your tire has an aspect ratio of 40%. In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 40% of the width. In this case, the sidewall height works out to be 126 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:

### 4Matic

## 275/45R21 107(Front)

### Simplified Size: 315-40-21

Simplified size is useful for shopping and buying tires.

The original tire size for your 2021 Mercedes-Benz GLS450 is **275/45R21 107H (Front)**. A color-coded explanation of the 2021 Mercedes-Benz GLS450's tire size is shown below.

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

21 | The tire size was designed to fit rims or wheels that are 21 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. | ||||||

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 123 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. |