2012 BMW ActiveHybrid 5 Tire Size

The original tire size for your 2012 BMW ActiveHybrid 5 is listed below. Tap on the box to view a color-coded explanation of the best BMW ActiveHybrid 5 tire size.

245/45R18/XL 100V

Simplified Size:  245-45-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2012 BMW ActiveHybrid 5 is 245/45R18/XL 100V.  A color-coded explanation of the 2012 BMW ActiveHybrid 5's tire size is shown below.

245

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

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.

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.

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 110 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
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.