2014 BMW Alpina B7 xDrive Tire Size

The original tire size for your 2014 BMW Alpina B7 xDrive is listed below. Tap on the box to view a color-coded explanation of the best BMW Alpina B7 xDrive tire size.

285/30ZR21/XL (100Y)(Rear)

Simplified Size:  245-35-21

Simplified size is useful for shopping and buying tires.

The original tire size for your 2014 BMW Alpina B7 xDrive is 245/35ZR21/XL 96(Y) (Front).  A color-coded explanation of the 2014 BMW Alpina B7 xDrive's tire size is shown below.

285

This number indicates that your tire has a width of 285 millimeters.

21

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

100

This tire has a load index of 100, which means it's capable of carrying a load of 1760 pounds (800 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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.

30

This number means that your tire has an aspect ratio of 30%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width.  In this case, the sidewall height works out to be 85 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
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.

245/35ZR21/XL (96Y)(Front)

Simplified Size:  285-30-21

Simplified size is useful for shopping and buying tires.

The original tire size for your 2014 BMW Alpina B7 xDrive is 245/35ZR21/XL 96(Y) (Front).  A color-coded explanation of the 2014 BMW Alpina B7 xDrive's tire size is shown below.

245

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

21

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

96

This tire has a load index of 96, which means it's capable of carrying a load of 1562 pounds (710 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

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.

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.

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
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.