2018 Audi RS7 Tire Size

The original tire size for your 2018 Audi RS7 is listed below. Tap on the box to view a color-coded explanation of the best Audi RS7 tire size.

275/30ZR21/XL (98Y)

Simplified Size:  275-30-21

Simplified size is useful for shopping and buying tires.

The original tire size for your 2018 Audi RS7 is 275/30ZR21/XL (98Y).  A color-coded explanation of the 2018 Audi RS7's tire size is shown below.


This number indicates that your tire has a width of 275 millimeters.


This number means that your tire has an aspect ratio of 30%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 30% of the width.  In this case, the sidewall height works out to be 82 millimeters.


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.


This letter denotes how your tire was constructed.  Radial is the standard construction method for about 99% of all tires sold today.

BBias Belt

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


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.


This tire has a load index of 98, which means it's capable of carrying a load of 1650 pounds (750 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 Y, which means 186 mph (300 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.