UN ECE adopts rules for tire noise and rolling resistance

  • 11-Nov-2011 08:29 EST

The 02 series of amendments to UN ECE (United Nations Economic Commission for Europe) Regulation No. 117 recently have been published, according to InterRegs, an online resource for global vehicle safety and emissions regulations. The amendments introduce limits on the maximum rolling resistance of tires, which are implemented in two phases, and reduce the maximum permissible noise limit for tires by between 2 and 4 dB(A). Compliance with the new noise limits, which are between 70 and 77 dB(A) dependent on tire size and type, becomes mandatory for all new types of tire (including those for heavy vehicles) from Nov. 1, 2012, as does compliance with the first-stage rolling resistance coefficient limits, which are between 8 and 13 N/kN dependent on size and type. The sale of noncompliant tires will be prohibited from Nov. 1, 2014 or Nov. 1, 2016, depending on size and type. Compliance with the more stringent second-stage rolling resistance coefficient limits, which are between 6.5 and 11.5 N/kN, becomes mandatory for all new types of tires from Nov. 1, 2016. The sale of tires that do not comply with the second-stage rolling resistance coefficient limits will be prohibited from Nov. 1, 2018 or Nov. 1, 2020, dependent on size and type.

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