Tire Width: The three-digit number refers to the overall width of the tire in millimeters.
Aspect Ratio: The relationship between the tire height and width. In this example, the tire height is approximately 60% of the tire width.
Radial: The letter "R" indicates a radial construction of the carcass plies. The carcass plies run across the tire from lip to lip, helping to provide strength, stability, flexibility, and ride comfort.
Wheel Diameter: The number indicates that this tire fits on a wheel with a 16-inch diameter.
Load Index: The load index can range from 0 to 279 and indicates how much weight the tire is certified to carry at maximum inflation pressure. Never buy a tire with a lower load index than your vehicle's original tire. To determine your tire'�s load capacity, refer to the load index chart (see below):
Speed Rating*: The speed rating tells you the top speed at which the tire can operate. Speed ratings range from Q (lowest) to Z (highest) with one exception: the H rating falls between U and V.
To maintain the speed capabililty of a vehicle, use replacement tires with ratings equal or greater than those of the original tires.
Mud & Snow: The letters M and S indicate that this tire meets the Rubber Manufacturer's Association's standards for a mud and snow tire. The letters can be found in the following combinations: M+S, M/S, and M&S. All-season tires carry this mark.
Note that a separate, severe snow marking appears on winter tires that are designated for severe snow applications.Tips: Never choose a tire that is smaller than the tire that came with the car. If you are interested in a size other than your vehicle's original equipment, or are upgrading, consult your local Uniroyal tire retailer.