4. (c) UN Regulation No. 117 (Tyre rolling resistance, rolling noise and wet grip)

GRBP is invited to consider a proposal for the 04 series of amendments to UN Regulation No. 117 submitted by the experts from the European Commission.

GRBP-76-02 | UN R117: Proposal to amend document GRBP/2022/23 Proposal from the Worn Tyres working group to amend their earlier formal submission.
GRBP/2022/12 | UN R117: Proposal for the 04 series of amendments Proposal to revise the limits for rolling resistance and wet grip, address tyres for vintage vehicles, and revise the definition for special-use C1 tyres.

GRBP will address a proposal prepared by the experts from ISO that brings the latest ISO 10844 standard test surface into the UN Regulation.

GRBP/2022/14 | UN R117: Proposal for Supplement 14 to the 02 series of amendments Proposal to bring the latest ISO 10844 standard test surface into the Regulation.

GRBP will be briefed on the activities of the IWG on Wet Grip Performance of Tyres in Worn State (IWG WGWT) and will consider their proposals for the moulded standard reference test tyre and wet grip of C2, C3, and some clusters of C1 tyres in worn state.

GRBP-76-05 | UN R117: Proposal to amend document GRBP/2022/22 Proposal from the Worn Tyres working group to amend its previous formal proposal.
GRBP-76-06 | Worn Tyres working group status report to GRBP
GRBP/2022/22 | UN R117: Proposal for a Supplement to the 03 series of amendments Proposal from the Worn Tyres working group to improve precision of the test procedures for measuring the wet adhesion of tyres in a worn state by using a moulded SRTT16 reference tyre (instead of a buffed tyre), to introduce new transitional provisions related to this change, to extend corrections already made to thee 02 series to the 03 series and make additional editorial corrections, and to define the range for tyre inflation vis-à-vis rim size to reduce uncertainties in measuring tread depth.
GRBP/2022/23 | UN R117: Proposal for a 04 series of amendments Proposal from the Worn Tyres working group to set the wet grip index threshold at 0.80 for class C1 tyres with a nominal aspect ratio equal to or less than 40, a section width equal to or higher than 235 mm and suitable for speeds equal to or greater than 300 km/h and for class C1 all terrain and special use tyres (see GRBP-75-27, slide 6). The proposal also introduces the k<sub>worn</sub> factor in a new para. 3 in Annex 9 to address wet grip of C2 and C3 tyres in a worn state (see GRBP-75-26-Rev.1 for concept).

GRBP will consider an amendment proposal concerning a “traction tyre” tabled by the expert from ETRTO.

GRBP/2022/17 | UN R117: Proposal for the 04 series of amendments Proposal to introduce a new definition of traction elements to characterize traction tyres.

GRBP is invited to address proposals submitted by the experts from ETRTO which aim to introduce provisions for type approval of special use tyres that fulfil the requirements for snow performance.

GRBP/2022/18 | UN R117: Proposal for a Supplement to the 03 series of amendments Proposal to introduce provisions to allow type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for tyres complying with these requirements.
GRBP/2022/19 | UN R117: Proposal for a Supplement to the 02 series of amendments Proposal to introduce provisions to allow the type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for those tyres complying with these requirements.

GRBP may also wish to consider corrections of editorial errors proposed by the expert from ETRTO.

GRBP/2022/20 | UN R117: Proposal for a Supplement to the 02 series of amendments Proposal to correct editorial mistakes in document GRBP/2021/17 that were not corrected by informal document GRBP74-31-Rev.1.

At its previous session, GRBP noted that the experts from France continued consultations on monitoring the machine deviation for rolling resistance measurements (ECE/TRANS/WP.29/GRBP/73, paragraph 24 and GRBP-74-04). GRBP may wish to be informed on the outcome of this activity.

GRBP-74-04 | UN R117: Proposal for amendments to the 02 series of amendments Proposal to add requirement on the monitoring of the machine deviation for rolling resistance measurement.
GRBP/2022/22 | UN R117: Proposal for a Supplement to the 03 series of amendments Proposal from the Worn Tyres working group to improve precision of the test procedures for measuring the wet adhesion of tyres in a worn state by using a moulded SRTT16 reference tyre (instead of a buffed tyre), to introduce new transitional provisions related to this change, to extend corrections already made to thee 02 series to the 03 series and make additional editorial corrections, and to define the range for tyre inflation vis-à-vis rim size to reduce uncertainties in measuring tread depth.
GRBP/2022/23 | UN R117: Proposal for a 04 series of amendments Proposal from the Worn Tyres working group to set the wet grip index threshold at 0.80 for class C1 tyres with a nominal aspect ratio equal to or less than 40, a section width equal to or higher than 235 mm and suitable for speeds equal to or greater than 300 km/h and for class C1 all terrain and special use tyres (see GRBP-75-27, slide 6). The proposal also introduces the k<sub>worn</sub> factor in a new para. 3 in Annex 9 to address wet grip of C2 and C3 tyres in a worn state (see GRBP-75-26-Rev.1 for concept).
GRBP/2022/12 | UN R117: Proposal for the 04 series of amendments Proposal to revise the limits for rolling resistance and wet grip, address tyres for vintage vehicles, and revise the definition for special-use C1 tyres.
GRBP/2022/14 | UN R117: Proposal for Supplement 14 to the 02 series of amendments Proposal to bring the latest ISO 10844 standard test surface into the Regulation.
GRBP/2022/17 | UN R117: Proposal for the 04 series of amendments Proposal to introduce a new definition of traction elements to characterize traction tyres.
GRBP/2022/20 | UN R117: Proposal for a Supplement to the 02 series of amendments Proposal to correct editorial mistakes in document GRBP/2021/17 that were not corrected by informal document GRBP74-31-Rev.1.
GRBP/2022/18 | UN R117: Proposal for a Supplement to the 03 series of amendments Proposal to introduce provisions to allow type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for tyres complying with these requirements.
GRBP/2022/19 | UN R117: Proposal for a Supplement to the 02 series of amendments Proposal to introduce provisions to allow the type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for those tyres complying with these requirements.
GRBP-76-02 | UN R117: Proposal to amend document GRBP/2022/23 Proposal from the Worn Tyres working group to amend their earlier formal submission.
GRBP-76-05 | UN R117: Proposal to amend document GRBP/2022/22 Proposal from the Worn Tyres working group to amend its previous formal proposal.
GRBP-76-06 | Worn Tyres working group status report to GRBP
GRBP-76-17 | UN R117: Proposal for amendments to the 04 series of amendments Proposal introduces a new definition for taxi tyres and establishes different threshold from other tyres.
GRBP-76-18 | UN R117: Presentation on the introduction of new class C1 Taxi tyre
GRBP-76-21 | UN R117: Proposal to amend the proposal for Supplement 2 to the 03 Series of amendments Proposals for editorial corrections to the provisions for type approval of special use tyres that fulfil the requirements for snow performance
GRBP-76-22 | UN R117: Proposal to amend the Supplement to the 02 series of amendments Proposal for editorial corrections
GRBP-76-23 | UN R117: Proposal for amendments to the proposal for 04 series of amendments Proposal introduces provisions to allow the type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for those tyres complying with these requirements.
GRBP-76-24/Rev.1 | UN R117: Proposal for amendment to proposal for the 04 series of amendments Proposal introduces provisions to allow the type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for those tyres complying with these requirements
GRBP-76-31 | UN R117: Proposal to amend the proposal for 04 series of amendments Re-introduces the definition of traction tyre as this can be still used between the entry into force date of the 04 series of amendments and 7 July 2024 .
GRBP-76-32 | UN R117: Proposal to amend the proposal for the 04 series of amendments Editorial corrections and amends the transitional provisions
GRBP-76-33/Rev 1 | UN R117: Proposal to amend proposal for 04 series of amendments Proposes the amendment to the transitional provisions aligning with other proposals
GRBP-76-34 | UN R117: Proposal for amendment to proposal for 03 series of amendments Proposal to update the reference to the latest ISO 10844 standard
GRBP-76-38 | UN R117: Overview of current amendment proposals
GRBP-76-02
UN R117: Proposal to amend document GRBP/2022/23
30 Aug 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal from the Worn Tyres working group to amend their earlier formal submission. GRBP-76-0002
GRBP-76-05
UN R117: Proposal to amend document GRBP/2022/22
15 Aug 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal from the Worn Tyres working group to amend its previous formal proposal. GRBP-76-0005
GRBP-76-06
Worn Tyres working group status report to GRBP
15 Aug 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance GRBP-76-0006
GRBP-76-17
UN R117: Proposal for amendments to the 04 series of amendments (Japan)
30 Aug 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal introduces a new definition for taxi tyres and establishes different threshold from other tyres. GRBP-76-0017
GRBP-76-18
UN R117: Presentation on the introduction of new class C1 Taxi tyre (Japan)
30 Aug 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance GRBP-76-0018
GRBP-76-21
UN R117: Proposal to amend the proposal for Supplement 2 to the 03 Series of amendments (ETRTO)
31 Aug 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposals for editorial corrections to the provisions for type approval of special use tyres that fulfil the requirements for snow performance GRBP-76-0021
GRBP-76-22
UN R117: Proposal to amend the Supplement to the 02 series of amendments (ETRTO)
31 Aug 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal for editorial corrections GRBP-76-0022
GRBP-76-23
UN R117: Proposal for amendments to the proposal for 04 series of amendments (ETRTO)
31 Aug 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal introduces provisions to allow the type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for those tyres complying with these requirements. GRBP-76-0023
GRBP-76-24/Rev.1
UN R117: Proposal for amendment to proposal for the 04 series of amendments (ETRTO)
03 Sep 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal introduces provisions to allow the type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for those tyres complying with these requirements GRBP-76-0024/Rev.1
GRBP-76-31
UN R117: Proposal to amend the proposal for 04 series of amendments (ETRTO)
03 Sep 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Re-introduces the definition of traction tyre as this can be still used between the entry into force date of the 04 series of amendments and 7 July 2024 . GRBP-76-0031
GRBP-76-32
UN R117: Proposal to amend the proposal for the 04 series of amendments (ETRTO)
03 Sep 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Editorial corrections and amends the transitional provisions GRBP-76-0032
GRBP-76-33/Rev 1
UN R117: Proposal to amend proposal for 04 series of amendments (ETRTO)
06 Sep 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposes the amendment to the transitional provisions aligning with other proposals GRBP-76-0033/Rev 1
GRBP-76-34
UN R117: Proposal for amendment to proposal for 03 series of amendments (ETRTO)
03 Sep 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal to update the reference to the latest ISO 10844 standard GRBP-76-0034
GRBP-76-35
UN R117: Proposal to amend the proposal for Supplement 14 to the 02 series of amendments (ETRTO)
03 Sep 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Updates the reference to latest version of ISO 10844:2021 GRBP-76-0035
GRBP-76-38
UN R117: Overview of current amendment proposals (ETRTO)
05 Sep 2022 Working Party Informal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance GRBP-76-0038
GRBP/2022/9/Rev.1
A general approach how to handle sound measurement uncertainty
24 Jun 2022 Working Party Formal Documents Vehicle Noise Emissions Vehicle Noise Uniform Provisions Concerning the Approval of Motor Vehicles having at least Four Wheels with regard to their Noise Emissions Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal for a reference document. GRBP/2022/0009/Rev.1
GRBP/2022/12
UN R117: Proposal for the 04 series of amendments (EC)
15 Jun 2022 Working Party Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal to revise the limits for rolling resistance and wet grip, address tyres for vintage vehicles, and revise the definition for special-use C1 tyres. GRBP/2022/0012
GRBP/2022/14
UN R117: Proposal for Supplement 14 to the 02 series of amendments (ISO)
15 Jun 2022 Working Party Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal to bring the latest ISO 10844 standard test surface into the Regulation. GRBP/2022/0014
GRBP/2022/17
UN R117: Proposal for the 04 series of amendments (ETRTO)
16 Jun 2022 Working Party Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal to introduce a new definition of traction elements to characterize traction tyres. GRBP/2022/0017
GRBP/2022/18
UN R117: Proposal for a Supplement to the 03 series of amendments (ETRTO)
16 Jun 2022 Working Party Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal to introduce provisions to allow type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for tyres complying with these requirements. GRBP/2022/0018
GRBP/2022/19
UN R117: Proposal for a Supplement to the 02 series of amendments (ETRTO)
16 Jun 2022 Working Party Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal to introduce provisions to allow the type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7. The respective marking related to the “Alpine” symbol has been considered for those tyres complying with these requirements. GRBP/2022/0019
GRBP/2022/20
UN R117: Proposal for a Supplement to the 02 series of amendments (ETRTO)
16 Jun 2022 Working Party Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal to correct editorial mistakes in document GRBP/2021/17 that were not corrected by informal document GRBP74-31-Rev.1. GRBP/2022/0020
GRBP/2022/22
UN R117: Proposal for a Supplement to the 03 series of amendments
16 Jun 2022 Working Party Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal from the Worn Tyres working group to improve precision of the test procedures for measuring the wet adhesion of tyres in a worn state by using a moulded SRTT16 reference tyre (instead of a buffed tyre), to introduce new transitional provisions related to this change, to extend corrections already made to thee 02 series to the 03 series and make additional editorial corrections, and to define the range for tyre inflation vis-à-vis rim size to reduce uncertainties in measuring tread depth. GRBP/2022/0022
GRBP/2022/23
UN R117: Proposal for a 04 series of amendments
16 Jun 2022 Working Party Formal Documents Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance Tire Noise, Wet Adhesion, and Rolling Resistance Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Proposal from the Worn Tyres working group to set the wet grip index threshold at 0.80 for class C1 tyres with a nominal aspect ratio equal to or less than 40, a section width equal to or higher than 235 mm and suitable for speeds equal to or greater than 300 km/h and for class C1 all terrain and special use tyres (see GRBP-75-27, slide 6). The proposal also introduces the k<sub>worn</sub> factor in a new para. 3 in Annex 9 to address wet grip of C2 and C3 tyres in a worn state (see GRBP-75-26-Rev.1 for concept). GRBP/2022/0023