# 2018 BMW 328d xDrive Tire Size

Your BMW was manufactured with different tire sizes. To determine the best tire size for your specific 2018 BMW 328d xDrive, we first need to determine your rim size. Please review the information below.

## How to Determine Rim Size

Check your existing tires. Your BMW 328d'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 BMW 328d xDrive

The original tire size for your 2018 BMW 328d xDrive is listed below. Tap on the box to view a color-coded explanation of your BMW 328d's' tire size.

## 225/50R17 94

### Simplified Size: 225-50-17

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW 328d xDrive is **225/50R17 94V**. A color-coded explanation of the 2018 BMW 328d xDrive's tire size is shown below.

225 | This number indicates that your tire has a width of 225 millimeters. | ||||||

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 112 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. | ||||||

94 | This tire has a load index of 94, which means it's capable of carrying a load of 1474 pounds (670 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 V, which means 149 mph (240 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

## 18-Inch Rims

### 2018 BMW 328d xDrive

Your 2018 BMW 328d xDrive 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 BMW 328d xDrive.

## 225/45R18 91

### Simplified Size: 225-45-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW 328d xDrive is **225/45R18 91V**. A color-coded explanation of the 2018 BMW 328d xDrive's tire size is shown below.

225 | This number indicates that your tire has a width of 225 millimeters. | ||||||

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 101 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. | ||||||

91 | This tire has a load index of 91, which means it's capable of carrying a load of 1353 pounds (615 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 V, which means 149 mph (240 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

## 225/45R18 91(Front)

### Simplified Size: 225-45-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW 328d xDrive is **225/45R18 91Y (Front)**. A color-coded explanation of the 2018 BMW 328d xDrive's tire size is shown below.

225 | This number indicates that your tire has a width of 225 millimeters. | ||||||

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 101 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. | ||||||

91 | This tire has a load index of 91, which means it's capable of carrying a load of 1353 pounds (615 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 Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

## 255/40R18 95(Rear)

### Simplified Size: 255-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW 328d xDrive is **225/45R18 91Y (Front)**. A color-coded explanation of the 2018 BMW 328d xDrive's tire size is shown below.

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

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 102 millimeters. | ||||||

R |
| ||||||

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

95 | This tire has a load index of 95, which means it's capable of carrying a load of 1518 pounds (690 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 Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes. A higher speed becomes dangerous. |

### 2018 BMW 328d xDrive - Similar Models

The 2018 BMW 328d xDrive has similar models that may have different tire sizes.

2018 BMW 328d