| UN R117: Proposal for a Supplement to the 03 series of amendments |
| Reference Number: GRBP/2022/22 |
|
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. |
| Meeting Sessions: 76th GRBP session (5-7 Sep 2022) |
| Document date: 16 Jun 22 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Proposal for a 04 series of amendments |
| Reference Number: GRBP/2022/23 |
|
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 kworn 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). |
| Meeting Sessions: 76th GRBP session (5-7 Sep 2022) |
| Document date: 16 Jun 22 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Proposal for the 04 series of amendments |
| Reference Number: GRBP/2022/12 |
|
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. |
| Submitted by: EC |
| Meeting Sessions: 76th GRBP session (5-7 Sep 2022) |
| Document date: 15 Jun 22 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Proposal for Supplement 14 to the 02 series of amendments |
| Reference Number: GRBP/2022/14 |
|
Proposal to bring the latest ISO 10844 standard test surface into the Regulation. |
| Submitted by: ISO |
| Meeting Sessions: 76th GRBP session (5-7 Sep 2022) |
| Document date: 15 Jun 22 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Proposal for the 04 series of amendments |
| Reference Number: GRBP/2022/17 |
|
Proposal to introduce a new definition of traction elements to characterize traction tyres. |
| Submitted by: ETRTO |
| Meeting Sessions: 76th GRBP session (5-7 Sep 2022) |
| Document date: 16 Jun 22 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Proposal for a Supplement to the 02 series of amendments |
| Reference Number: GRBP/2022/20 |
|
Proposal to correct editorial mistakes in document GRBP/2021/17 that were not corrected by informal document GRBP74-31-Rev.1. |
| Submitted by: ETRTO |
| Meeting Sessions: 76th GRBP session (5-7 Sep 2022) |
| Document date: 16 Jun 22 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Proposal for a Supplement to the 03 series of amendments |
| Reference Number: GRBP/2022/18 |
|
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. |
| Submitted by: ETRTO |
| Meeting Sessions: 76th GRBP session (5-7 Sep 2022) |
| Document date: 16 Jun 22 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| UN R117: Proposal for a Supplement to the 02 series of amendments |
| Reference Number: GRBP/2022/19 |
|
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. |
| Submitted by: ETRTO |
| Meeting Sessions: 76th GRBP session (5-7 Sep 2022) |
| Document date: 16 Jun 22 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
| A general approach how to handle sound measurement uncertainty |
| Reference Number: GRBP/2022/9/Rev.1 |
|
Proposal for a reference document. |
| Meeting Sessions: 76th GRBP session (5-7 Sep 2022) |
| Document date: 24 Jun 22 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions and UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance |
| Click here to view the full document file |
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