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Low external noise tire labeling system

1. What is the low noise tire labeling system?

In order to address the issue of tire noise and contribute to improving the roadside environment, the automobile tire industry has undertaken a voluntary initiative to designate tires that meet the external noise standards set out in UN R117-02 *1 as "low external noise tires," and to promote the spread of low external noise tires by establishing a labeling system.

This system applies to commercially available summer and winter tires for passenger cars, light trucks, and trucks and buses.

  • It will begin operation in January 2023.
  • Tires that meet this standard are labeled as "low external noise tires" and an icon representing this is displayed.
     

*1 Technical standards established by the United Nations Economic Commission for Europe (UNECE) as a measure to reduce tire noise

 

<Low noise tire icon>
低車外音タイヤ

2. Standards for low external noise tires

The standard for "low external noise tires" refers to the external noise standard values ​​for tires set out in UNECE's "UN R117-02," and is specified as follows for each tire category:

  • Passenger car tires

            TRAIL-TERRAIN T/A

Nominal cross-sectional width

Regulation value dB (A)

185 or less

70

185cm tall and under 245cm tall

71

245 to 275

72

275 Super

74


  •   　    ALL-TERRAIN T/A KO3 light truck tire

Application Category

Regulation value dB (A)

Severe Snow TiresSnow tires for use
in severe snow conditions

73

 
*For severe snow tires (snow tires for use under severe snow conditions), extra load tires, reinforced tires, or a combination of these, the above standard value shall be increased by 1 dB (A).
*Standard values ​​differ for tires for light commercial vehicles and tires for medium and large commercial vehicles.

 

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