2017 BMW M240i Tire Size

Your 2017 BMW M240i 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 2017 BMW M240i.

Trim Options:

ConvertibleCoupe

225/40R18/XL 92V

Simplified Size:  225-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2017 BMW M240i is 225/40R18/XL 92V.  A color-coded explanation of the 2017 BMW M240i's tire size is shown below.

225

This number indicates that your tire has a width of 225 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 90 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
18

The tire size was designed to fit rims or wheels that are 18 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.

92

This tire has a load index of 92, which means it's capable of carrying a load of 1386 pounds (630 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

V

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.

Trim Options:

ConvertibleCoupe

225/40ZR18 88Y(Front)

Simplified Size:  225-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2017 BMW M240i is 225/40ZR18 88Y (Front).  A color-coded explanation of the 2017 BMW M240i's tire size is shown below.

225

This number indicates that your tire has a width of 225 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 90 millimeters.

Z

This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h).  A tire's speed class is less specific than the speed rating.

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
18

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

88

This tire has a load index of 88, which means it's capable of carrying a load of 1232 pounds (560 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

Y

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.

Trim Options:

ConvertibleCoupe

245/35ZR18/XL 92Y(Rear)

Simplified Size:  245-35-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2017 BMW M240i is 225/40ZR18 88Y (Front).  A color-coded explanation of the 2017 BMW M240i's tire size is shown below.

245

This number indicates that your tire has a width of 245 millimeters.

35

This number means that your tire has an aspect ratio of 35%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 35% of the width.  In this case, the sidewall height works out to be 85 millimeters.

Z

This tire has a speed class of Z, which means it's part of an elite speed class of 149 mph or more (240 km/h).  A tire's speed class is less specific than the speed rating.

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
18

The tire size was designed to fit rims or wheels that are 18 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.

92

This tire has a load index of 92, which means it's capable of carrying a load of 1386 pounds (630 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

Y

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.

2017 BMW M240i - Similar Models

The 2017 BMW M240i has similar models that may have different tire sizes.

2017 BMW M240i xDrive