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Step 1
Determine the proper size for the vehicle, using either the owner's manual or the gross vehicle weight and tire size plate on the door jam. Another way to determine if the vehicle has the proper tire size on the vehicle is to call a tire store and have them look the vehicle up in the tire guide. Size, load factor and speed rating are the key items.
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Step 2
Look at the sticker on the new tire or the side wall and the necessary numbers will be displayed. The sticker will have a series of numbers such as 225/60/15. These numbers are interpreted as follows: the 225 is the width of the tire, the 60 denotes that the tire is 60 percent as high on the side as it is wide and the last figure is the size of the rim.
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Step 3
Compare the load ratings. It will have a load rating, which is the amount of weight the tire was designed to carry, written on the sticker. Always demand the same or better, never less.
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Step 4
Compare the traction rating. It will say traction A, B or C. A is the best in wet weather.
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Step 5
Compare the treadwear rating. The treadwear denotes how long the tire will last. The treadwear will be from approximately 150 for a poor treadwear or low-mileage tire to a 450 for a high-mileage tire.
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Step 6
Compare the speed rating. This denotes the tire's ability to dissipate heat at high speeds or more importantly at freeway cruising speeds. The cooler the tread stays when cruising the longer it lasts. Since natural rubber wears faster than synthetic material but dissipates heat much faster than synthetic and is more expensive, the manufacturer puts it under the synthetic tread to keep it cool. The more natural rubber the better and the higher the speed rating.
When all the figures and configurations in Steps 1 through 6 are compared, keeping in mind that the better the tire, the more expensive it will be. If Brand A is cheaper than Brand B, you will be able to see where Brand A is lacking after making all of these comparisons. A tire that is lacking in quality in any one or more areas will be cheaper.











