2004 Cadillac XLR Tire Size

The original tire size for your 2004 Cadillac XLR is listed below. Tap on the box to view a color-coded explanation of the best Cadillac XLR tire size.

P235/50ZR18 97W

Simplified Size:  235-50-18

Simplified size is useful for shopping and buying tires.

The original tire size for your 2004 Cadillac XLR is P235/50ZR18 97W.  A color-coded explanation of the 2004 Cadillac XLR's tire size is shown below.


This letter denotes the intended use of the tire.

PPassenger Vehicle
LTLight Truck
CCommercial Vehicle

This number indicates that your tire has a width of 235 millimeters.


This number means that your tire has an aspect ratio of 50%.  In other words, your tire's sidewall height (from the edge of the rim to the tire's tread) is 50% of the width.  In this case, the sidewall height works out to be 117 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 18 inches in diameter.


This tire has a load index of 97, which means it's capable of carrying a load of 1606 pounds (730 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 W, which means 167 mph (270 km/h) is the maximum speed that can be sustained for 10 minutes.  A higher speed becomes dangerous.