Treadwear Rating
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Treadwear Rating
I know the higher the number, the longer the treadlife, but what does the number stand for? Does 300 translate into some number of miles or something?
Well the tread ratings vary from tire company to tire company. I forgot how it all went but the thing you have to realize is that it depends on how you drive mostly how long the tires will last. Rule of thumb is the softer the compound the faster it will wear out.
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From: 4o8, California
Rep Power: 310 Here ya go.. quoted from Tirerack.com:
The Department of Transportation requires each manufacturer to grade its tires under the Uniform Tire Quality Grade (UTQG) labeling system and establish ratings for treadwear, traction, and temperature resistance. These tests are conducted independently by each manufacturer following government guidelines to assign values that represent a comparison between the tested tire and a control tire. While traction and temperature resistance ratings are specific performance levels, the treadwear ratings are assigned by the manufacturers following field testing and are most accurate when comparing tires of the same brand.
Treadwear
Treadwear receives a comparative rating based on wear rate of the the tire in field testing following a government specified course. For example, a tire grade of 150 wears 1.5 times as long as a tire graded 100. Actual performance of the tire can vary significantly depending on conditions, driving habits, care, road characteristics, and climate.
Traction
Straight-a-head wet braking traction has been represented by a grade of A, B, or C with A being the highest. In 1997 a new top rating of "AA" has been introduced to indicate even greater wet braking traction. However, due to its newness, this grade will probably be applied initially to new tire lines as they are introduced and later to existing lines which excel in wet braking, but had been limited to the previous top grade of "A". Traction grades do not indicate wet cornering ability.
Temperature
Temperature resistance is graded A, B or C. It represents the tire's resistance to the heat generated by running at high speed. Grade C is the minimum level of performance for all passenger car tires as set under Federal Motor Vehicle Safety Standards. This grade is established for a tire that is properly inflated and not overloaded.
Note: UTQG ratings are not required on winter and light truck sized tires.
The Department of Transportation requires each manufacturer to grade its tires under the Uniform Tire Quality Grade (UTQG) labeling system and establish ratings for treadwear, traction, and temperature resistance. These tests are conducted independently by each manufacturer following government guidelines to assign values that represent a comparison between the tested tire and a control tire. While traction and temperature resistance ratings are specific performance levels, the treadwear ratings are assigned by the manufacturers following field testing and are most accurate when comparing tires of the same brand.
Treadwear
Treadwear receives a comparative rating based on wear rate of the the tire in field testing following a government specified course. For example, a tire grade of 150 wears 1.5 times as long as a tire graded 100. Actual performance of the tire can vary significantly depending on conditions, driving habits, care, road characteristics, and climate.
Traction
Straight-a-head wet braking traction has been represented by a grade of A, B, or C with A being the highest. In 1997 a new top rating of "AA" has been introduced to indicate even greater wet braking traction. However, due to its newness, this grade will probably be applied initially to new tire lines as they are introduced and later to existing lines which excel in wet braking, but had been limited to the previous top grade of "A". Traction grades do not indicate wet cornering ability.
Temperature
Temperature resistance is graded A, B or C. It represents the tire's resistance to the heat generated by running at high speed. Grade C is the minimum level of performance for all passenger car tires as set under Federal Motor Vehicle Safety Standards. This grade is established for a tire that is properly inflated and not overloaded.
Note: UTQG ratings are not required on winter and light truck sized tires.
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From: San Diego, California, US
Rep Power: 0 THE UTQG RATING SYSTEM
The Federal Government established the UTQG (Uniform Tire Quality Grading) system to attempt to better inform consumers about the tires they are purchasing. It can be a useful tool in comparing tires from the same manufacturer. The UTQG is not a warranty or guarantee that a tire will last for a certain number of miles. It is simply a way to compare tires in three ways: Treadwear, traction, and temperature. The reason the UTQG is not good for comparing tires from different manufacturers is that the numbers and letters that make up the grading system are all relative to other tires by that manufacturer. Example: The first number represents the tread wear of the tire. If a certain manufacturer ranks their lowest mileage tire at 150 they would rank a tire that lasts twice as long at 300. If another manufacturer ranked their lowest tire at 250 they would rank a tire that lasted twice as long at 500. This does not mean that the 500 tire is going to last any longer than the 300 tire. The next letter(s) in the UTQG are for measuring the tires ability to stop in a straight line on wet pavement. This is not a measurement of the cornering ability of a tire. The rankings for traction from best to worst are AA,A,B,C. The last letter in the UTQG is used to measure the tires ability to dissipate heat. A tire that quickly dissipates heat will generally last longer than a tire that dissipates heat more slowly. The rankings for temperature from best to worst are A,B,C.
The Federal Government established the UTQG (Uniform Tire Quality Grading) system to attempt to better inform consumers about the tires they are purchasing. It can be a useful tool in comparing tires from the same manufacturer. The UTQG is not a warranty or guarantee that a tire will last for a certain number of miles. It is simply a way to compare tires in three ways: Treadwear, traction, and temperature. The reason the UTQG is not good for comparing tires from different manufacturers is that the numbers and letters that make up the grading system are all relative to other tires by that manufacturer. Example: The first number represents the tread wear of the tire. If a certain manufacturer ranks their lowest mileage tire at 150 they would rank a tire that lasts twice as long at 300. If another manufacturer ranked their lowest tire at 250 they would rank a tire that lasted twice as long at 500. This does not mean that the 500 tire is going to last any longer than the 300 tire. The next letter(s) in the UTQG are for measuring the tires ability to stop in a straight line on wet pavement. This is not a measurement of the cornering ability of a tire. The rankings for traction from best to worst are AA,A,B,C. The last letter in the UTQG is used to measure the tires ability to dissipate heat. A tire that quickly dissipates heat will generally last longer than a tire that dissipates heat more slowly. The rankings for temperature from best to worst are A,B,C.
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