2007 Lexus GS450h Tire Size

Your 2007 Lexus GS450h 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 2007 Lexus GS450h.

245/40ZR18

Simplified Size:  245-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2007 Lexus GS450h is 245/40ZR18.  A color-coded explanation of the 2007 Lexus GS450h's tire size is shown below.

245

This number indicates that your tire has a width of 245 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 98 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.

P245/40R18 93V

Simplified Size:  245-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2007 Lexus GS450h is P245/40R18 93V.  A color-coded explanation of the 2007 Lexus GS450h's tire size is shown below.

P

This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle
245

This number indicates that your tire has a width of 245 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 98 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.

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.

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.