# 2010 Lexus GS450h Tire Size

Your 2010 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 2010 Lexus GS450h.

## 245/40ZR18

### Simplified Size: 245-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2010 Lexus GS450h is **245/40ZR18**. A color-coded explanation of the 2010 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.
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18 | The tire size was designed to fit rims or wheels that are 18 inches in diameter. |

## P245/40R18 93

### Simplified Size: 245-40-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2010 Lexus GS450h is **P245/40R18 93V**. A color-coded explanation of the 2010 Lexus GS450h's tire size is shown below.

P | This letter denotes the intended use of the tire.
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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.
| ||||||

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. | ||||||

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. |