GAR

UN R117: Proposal for Supplement 4 to the 04 series of amendments

Reference Number: GRBP/2025/26

Proposal to clarify tyre abrasion provisions, including to add an ice temperature range of -5°C to -2°C to the test conditions for ice grip tyres.

Submitted by: Japan

Meeting Sessions: 82nd GRBP session (3-5 Sep)

Document date: 20 Jun 25

Document status: Formal GR review

Relevant to

UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

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UN R117: Proposal for a Supplement 4 to the 04 Series of amendments

Reference Number: GRBP-82-26

Addresses a real-life situation that is not considered by current ice grip test conditions: the wet ice (or black ice) conditions.

Submitted by: ETRTO

Meeting Sessions: 82nd GRBP session (3-5 Sep)

Document date: 02 Sep 25

Relevant to

UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

View full document file for more information

Download from UNECE:

.pdf format

.pptx format

UN R117: Proposal for Supplement 4 to the 04 Series of amendments

Reference Number: GRBP-82-27

Proposal for new provisions for the track characterization with additional new text and re-introduces deleted text

Submitted by: ETRTO

Meeting Sessions: 82nd GRBP session (3-5 Sep)

Document date: 02 Sep 25

Relevant to

UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

View full document file for more information

Download from UNECE:

.pdf format

.docx format

UN R117: GOIE on Tyre Noise Level Alignment (TNLA); Status Report

Reference Number: GRBP-82-28

Meeting Sessions: 82nd GRBP session (3-5 Sep)

Document date: 03 Sep 25

Relevant to

UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

Download from UNECE:

.pdf format

.pptx format

IWG for Wet Grip on Worn Tyres (WGWT): Status Report

Reference Number: GRBP-82-31

Meeting Sessions: 82nd GRBP session (3-5 Sep)

Document date: 02 Sep 25

Relevant to

UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

Download from UNECE:

.pdf format

.pptx format

IWG on Wet Grip Performance for Tyres in a Worn State (WGWT): Revised Terms of Reference

Reference Number: GRBP-82-32

Meeting Sessions: 82nd GRBP session (3-5 Sep)

Document date: 02 Sep 25

Relevant to

UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance

Download from UNECE:

.pdf format

.docx format

Annotations

Documentation

GRBP will address amendment proposals on the test conditions for ice grip tyres that were submitted by the expert from Japan.

GRBP/2025/26

UN R117: Proposal for Supplement 4 to the 04 series of amendments

Other submissions

GRBP-82-26	UN R117: Proposal for a Supplement 4 to the 04 Series of amendments
GRBP-82-27	UN R117: Proposal for Supplement 4 to the 04 Series of amendments
GRBP-82-28	UN R117: GOIE on Tyre Noise Level Alignment (TNLA); Status Report
GRBP-82-31	IWG for Wet Grip on Worn Tyres (WGWT): Status Report
GRBP-82-32	IWG on Wet Grip Performance for Tyres in a Worn State (WGWT): Revised Terms of Reference