# 2018 BMW i3 Tire Size

Your BMW was manufactured with different tire sizes. To determine the best tire size for your specific 2018 BMW i3, we first need to determine your rim size. Please review the information below.

## How to Determine Rim Size

Check your existing tires. Your BMW i3'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.

## 19-Inch Rims

### 2018 BMW i3

There are multiple tire sizes for your 2018 BMW i3 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 BMW i3.

## 155/70R19 84

### Simplified Size: 155-70-19

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW i3 is **155/70R19 84Q**. A color-coded explanation of the 2018 BMW i3's tire size is shown below.

155 | This number indicates that your tire has a width of 155 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 108 millimeters. | ||||||

R | This letter denotes how your tire was constructed. Radial is the standard construction method for about 99% of all tires sold today.
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19 | The tire size was designed to fit rims or wheels that are 19 inches in diameter. | ||||||

84 | This tire has a load index of 84, which means it's capable of carrying a load of 1100 pounds (500 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. |

## 155/70R19 84(Front)

### Simplified Size: 155-70-19

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW i3 is **155/70R19 84Q (Front)**. A color-coded explanation of the 2018 BMW i3's tire size is shown below.

155 | This number indicates that your tire has a width of 155 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 108 millimeters. | ||||||

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

19 | The tire size was designed to fit rims or wheels that are 19 inches in diameter. | ||||||

84 | This tire has a load index of 84, which means it's capable of carrying a load of 1100 pounds (500 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. |

## 175/60R19 86(Rear)

### Simplified Size: 175-60-19

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW i3 is **155/70R19 84Q (Front)**. A color-coded explanation of the 2018 BMW i3's tire size is shown below.

175 | This number indicates that your tire has a width of 175 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 105 millimeters. | ||||||

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

19 | The tire size was designed to fit rims or wheels that are 19 inches in diameter. | ||||||

86 | This tire has a load index of 86, which means it's capable of carrying a load of 1166 pounds (530 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. |

## 20-Inch Rims

### 2018 BMW i3

The original tire size for your 2018 BMW i3 is listed below. Tap on the box to view a color-coded explanation of your BMW i3's' tire size.

## 155/60R20 80(Front)

### Simplified Size: 155-60-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW i3 is **155/60R20 80Q (Front)**. A color-coded explanation of the 2018 BMW i3's tire size is shown below.

155 | This number indicates that your tire has a width of 155 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 93 millimeters. | ||||||

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

80 | This tire has a load index of 80, which means it's capable of carrying a load of 990 pounds (450 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||

## 175/55R20/XL 89(Rear)

### Simplified Size: 175-55-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW i3 is **155/60R20 80Q (Front)**. A color-coded explanation of the 2018 BMW i3's tire size is shown below.

175 | This number indicates that your tire has a width of 175 millimeters. | ||||||

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 96 millimeters. | ||||||

R |
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20 | The tire size was designed to fit rims or wheels that are 20 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. | ||||||

89 | This tire has a load index of 89, which means it's capable of carrying a load of 1276 pounds (580 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||