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Transmitted by the expert from

ETRTO. . Informal document. . GRB-. 62. -17. (62nd GRB, 1-3 September 2015,. agenda item . 7). . Key Comments. The subset of C1 & C2 tyres . used in the studies presented by The Netherlands .

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Transmitted by the expert from






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Slide1

Transmitted by the expert from ETRTO

Informal document

GRB-

62

-17

(62nd GRB, 1-3 September 2015,

agenda item

7)

Slide2

Key CommentsThe subset of C1 & C2 tyres used in the studies presented by The Netherlands does not represent the European tyre market and is biased towards low noiseThe database used in the studies presented by The Netherlands do not identify which tyres are traction marked.The definition of C3 traction tyres used in the studies presented by The Netherlands is not according to UN Reg. 117.02

ETRTO

cannot

enter

into

details

on the

tyre

market

pricing

Any assessment

in terms of future potential for improvement

can only be done as long as all

tyres

complying to all UN Reg. 117.02 requirements

are on the market.

Slide3

Evaluation of tyre noise limits based on sold tyres in The Netherlands – C1 & C2 tyres ETRTO considered the database from which NL extracted a subset for their studies and, in our view,:The VACO database

is representative for the tyres on sale in

Europe

The subset of C1 & C2 tyres derived from

the

extraction of the 2013’s VACO database is biased towards low noise and is not representative for the current VACO database.

VACO C1

database

(19569 labels)

database of C1

tyres

on sale in Europe

(30820 labels)

4 % of VACO database

C1 subset

of VACO database used in M+P & TNO study(760 labels)

Example for C1:

Slide4

Evaluation of tyre noise limits based on sold tyres in The Netherlands – C3 tyresETRTO considered the database from which NL extracted a subset in their studies and, in our view,:

The

subset of

C3

tyres

in the M+P and TNO study seems to have a similar distribution compared to the distribution of the C3 VACO databaseTraction tyresIn the VACO database the “Traction” marked tyres according to UN Reg. 117.02 cannot be identified.

However, the

assumption in the M+P & TNO study that C3 traction tyres

are all tyres fitted on the drive axle is incorrect.

Consequently, the 2 dB(A) allowance is assumed for a too high number of C3 tyres.

Slide5

Cost-Benefit Analyses of the use of better tyresRef

. GRB-61-03:

Figure 3. Aspects of the

tyre

label versus the advice sale prices of car

tyres in the Netherlands. Internet sales the Netherlands, 472 tyres size 205/55R16, http://www.autobandenmarkt.nl/index.html. ETRTO comment:The link between the 4 graphs is not considered and thus the conclusions are not valid

Slide6

New Tyre Types

Existing Tyre Types

RR Stage1

Noise

RR Stage2

Wet Grip

RR Stage1

Noise

RR Stage2

Wet Grip

Wet Grip

RR Stage1

Noise

RR Stage2

RR Stage1

Noise

RR Stage2

Wet Grip

C1

C2

C3

New Vehicle

Models

Wet Grip

RR Stage1

Noise

RR Stage1

Noise

RR Stage1

Noise

RR Stage2

Wet Grip

RR Stage2

Wet Grip

RR Stage2

RR Stage2

RR Stage1

Noise

RR Stage2

Wet Grip

Wet Grip

RR Stage1

New Tyre Types

New Tyre Types

Noise

1

st

/Nov

2012

1

st

/Nov

2014

1

st

/Nov

2

016

1

st

/Nov 2

018

1

st

/Nov

2020

1

st

/Nov

2013

1

st/Nov 2017

New VehicleTypes

New VehicleModels

Existing Tyre Types

Existing Tyre Types

UN Regulation 117 IMPLEMENTATION STEPS

A realistic State of Art and its assessment in terms of future potential for improvement can only be done when all the

tyres

complying to all UN Reg. 117.02 requirements are on the market.

Slide7

Thank you!

European Tyre and Rim Technical Organisation