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Transmitted by the expert from ETRTO

Informal document GRRF-73-21 (73 rd GRRF, 18-20 September 2012 Agenda item 7(d)). Transmitted by the expert from ETRTO. WET GRIP ADHESION FOR C2 & C3 TYRES Tyre industry position with respect to implementation of new minimum requirements for wet grip on C2 and C3 tyres.

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Transmitted by the expert from ETRTO

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  1. Informal documentGRRF-73-21 (73rd GRRF, 18-20 September 2012Agenda item 7(d)) Transmitted by the expert from ETRTO WET GRIP ADHESION FOR C2 & C3 TYRES Tyre industry position with respect to implementation of new minimum requirements for wet grip on C2 and C3 tyres Reference to document GRRF-73-08

  2. Introduction • The minimum requirement for wet grip on C2/C3 tyres has been proposed to keep the minimum WG performanceas per the European State of Art.The reason is exactly the one that the Commission stresses in its proposal: provide a safety net that the wet grip performance is NOT deteriorated after the introduction of more stringent RR & Noise requirements for these tyres. • The impact on the State of the Art of the forthcoming new requirements for Rolling Resistance and Noise are unknown. Therefore, at least the current level on wet grip performance must be maintained.

  3. Reg. 117 Implementation steps • UN Reg. 117  has very demanding and challenging implementation steps. Step 2 for RR will start in November 2016 for new tyre types and will be completed November 2020  for the entire market.  • In order to minimize the administrative and logistics burden on the Industry, the implementation timing introducing the limits for wet grip on C2 and C3 tyres should follow the same scheme (next page)  

  4. UN Regulation 117 IMPLEMENTATION STEPS 1st/Nov 2018 1st/Nov 2012 1st/Nov 2013 1st/Nov 2014 1st/Nov 2016 1st/Nov 2017 1st/Nov 2020 Wet Grip RR Stage1 Noise New Tyre Types RR Stage2 Wet Grip RR Stage1 Noise New Vehicle Types C1 RR Stage2 Existing Tyre Types Wet Grip RR Stage1 RR Stage2 Noise New Tyre Types RR Stage1 Noise RR Stage2 New Vehicle Models C2 RR Stage1 Noise RR Stage2 Existing Tyre Types RR Stage2 Noise RR Stage1 New Tyre Types RR Stage1 Noise RR Stage2 New Vehicle Models RR Stage1 Noise C3 RR Stage2 Existing Tyre Types RR Stage1 Noise RR Stage2

  5. Position • For all these reasons, the European tyre industry does not support the idea of anticipating the date of implementation nor of making mandatory the limits for new tyre types only. • Our objective is to ensure that  the whole market falls under this rule which ensure a minimum level for WG.

  6. UN Regulation 117 IMPLEMENTATION STEPS - PROPOSAL 1st/Nov 2018 1st/Nov 2012 1st/Nov 2013 1st/Nov 2014 1st/Nov 2016 1st/Nov 2017 1st/Nov 2020 Wet Grip RR Stage1 Noise New Tyre Types RR Stage2 Wet Grip RR Stage1 Noise New Vehicle Types C1 RR Stage2 Existing Tyre Types Wet Grip RR Stage1 RR Stage2 Noise New Tyre Types RR Stage1 Noise RR Stage2 Wet Grip New Vehicle Models C2 RR Stage1 Noise RR Stage2 Wet Grip Existing Tyre Types RR Stage2 Wet Grip Noise RR Stage1 New Tyre Types RR Stage1 Noise RR Stage2 Wet Grip New Vehicle Models RR Stage1 Noise C3 RR Stage2 Wet Grip Existing Tyre Types RR Stage1 Noise RR Stage2 Wet Grip

  7. Thank you!

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