2018 BMW i3 s Tire Size

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

175/55R20/XL 89T(Front)

Simplified Size:  175-55-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW i3 s is 175/55R20/XL 89T (Front).  A color-coded explanation of the 2018 BMW i3 s'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

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

RRadial
BBias Belt
DDiagonal
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.

T

This tire has a speed rating of T, which means 118 mph (190 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

195/50R20/XL 93T(Rear)

Simplified Size:  195-50-20

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 BMW i3 s is 175/55R20/XL 89T (Front).  A color-coded explanation of the 2018 BMW i3 s's tire size is shown below.

195

This number indicates that your tire has a width of 195 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 97 millimeters.

R

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

RRadial
BBias Belt
DDiagonal
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.

93

This tire has a load index of 93, which means it's capable of carrying a load of 1430 pounds (650 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

T

This tire has a speed rating of T, which means 118 mph (190 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.