2005 Audi S4 Tire Size
The original tire size for your 2005 Audi S4 is listed below. Tap on the box to view a color-coded explanation of the best Audi S4 tire size.
Trim Options:
AvantBaseCabriolet
235/40R18 91
Simplified Size: 235-40-18
Simplified size is useful for shopping and buying tires.
The original tire size for your 2005 Audi S4 is 235/40R18 91Y. A color-coded explanation of the 2005 Audi S4's tire size is shown below.
235 | This number indicates that your tire has a width of 235 millimeters. | ||||||
18 | The tire size was designed to fit rims or wheels that are 18 inches in diameter. | ||||||
91 | This tire has a load index of 91, which means it's capable of carrying a load of 1353 pounds (615 kg) or less. A higher number means the tire can carry more weight. A lower number means the opposite. | ||||||
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 94 millimeters. | ||||||
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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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. |