2011 Infiniti FX50 Tire Size

Your 2011 Infiniti FX50 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 2011 Infiniti FX50.

265/45R21 104W

Simplified Size:  265-45-21

Simplified size is useful for shopping and buying tires.

The original tire size for your 2011 Infiniti FX50 is 265/45R21 104W.  A color-coded explanation of the 2011 Infiniti FX50's tire size is shown below.

265

This number indicates that your tire has a width of 265 millimeters.

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 119 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
21

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

104

This tire has a load index of 104, which means it's capable of carrying a load of 1980 pounds (900 kg) or less.  A higher number means the tire can carry more weight.  A lower number means the opposite.

W

This tire has a speed rating of W, which means 167 mph (270 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.

P265/45R21 104V

Simplified Size:  265-45-21

Simplified size is useful for shopping and buying tires.

The original tire size for your 2011 Infiniti FX50 is P265/45R21 104V.  A color-coded explanation of the 2011 Infiniti FX50's tire size is shown below.

P

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
265

This number indicates that your tire has a width of 265 millimeters.

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 119 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
21

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

104

This tire has a load index of 104, which means it's capable of carrying a load of 1980 pounds (900 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.