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BSMI revises automobile tires standard with revisions on service life limitation
Organization: Bureau of Standards, Metrology & Inspection, M.O.E.A., R.O.C.        Publish Date: 2016-06-23 12:24
The Bureau of Standards, Metrology & Inspection (BSMI) has revised the "CNS 1431 Automobile tires" on December 16, 2015 to enhance driving safety. The new standard, with reference to ISO standards and reports from other countries, specifies installation and service life of tires for cars (automobiles, trucks and passenger cars).

The revisions are as follows:
1.New tires should not be put into service if they are over six years from the date of manufacture.
2.The maximum service life is recommended to be ten years from the date of manufacture.
The service life should be shortened depending on the practical conditions of the tire. Tires are important components of a vehicle, which support the weight of a car, grip the road surface and drain the water, and the quality of which directly affect the driving safety. For safety consideration, consumers should be aware of the following criteria when purchasing tires, said the BSMI:

1.Choosing new tires with labelling of Commodity Inspection Mark (as attached).
2.Checking the date of manufacture, with a code of four digits on the side of the tire.The first two digits denotes the week number of the year and the last two digits the year (e.g., 1115 denoting the 11th week of 2015). Manufacturer offers pamphlets at retail stores, which can help consumers read the tire labels.
3.Checking the thread wear indicators. There shall be a definite number of thread wear indicators in the main grooves around the circumference equidistantly, as well as delta marks (e.g.,) on both side wall of tire. No thread wear indicators shall be less than 1.6 mm from the bottom of grooves. As the thread is worn to the indicator, the tire should not be used because of reduction of ground grip force, especially the wet traction.
4.Adhering to regular tire maintenance routine. Check the height of tire treads and tire pressure periodically, and seek professional help when you discover a crack, a cut, a thorn, or pebbles. Tires are made of rubber so that they will age naturally over time. Their service life should not exceed ten years from the date of manufacture.

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Agency in charge: Department of Standards (First Division)
Contact person: Mr. Shih-Wei Ni
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