WET GRIP ADHESION FOR C2

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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
Informal document GRRF-73-21 (73rd GRRF, 18-20
September 2012Agenda item 7(d))
Transmitted by the expert from ETRTO
Reference to document GRRF-73-08
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Introduction

• The minimum requirement for wet grip on C2/C3
  tyres has been proposed to keep the minimum WG
  performance as 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.

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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)  

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

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