| UN R117: Proposal to amend document GRBP2026/6 |
| Reference Number: GRBP-83-20/Rev.2 |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 13 Feb 26 |
| Document status: Superseded |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 Proposal to amend the 04 series of amendments |
| Reference Number: GRBP-83-24/Rev.1 |
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Proposal to amend Annex 5, part (B) of UN R117. Changes include replacing “Average Deceleration (AD)” with “braking force coefficient (BFC)” terminology throughout paragraphs 2.2.2.1., 2.2.2.7.1., 2.2.2.7.2., and 2.2.2.7.3. Paragraph 2.2.2.3. is amended to clarify terminology regarding vertical static test load and load capacity. Paragraph 2.2.2.7.4. is deleted. Paragraphs 2.2.2.7.5. through 2.2.2.8.4. are renumbered and amended to align the wet grip test method for C2 and C3 tyres with changes made to the passenger car test method and ISO 15222:2025. |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 11 Feb 26 |
| Document status: Informal GR review |
| 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: Update on measurement uncertainties reduction efforts |
| Reference Number: GRBP-83-25 |
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ETRTO measurement uncertainties reduction efforts for UN R117 rolling sound emission test methods are progressing through outdoor and indoor Round Robin tests. Eight of thirteen outdoor test centres have completed tests for C1 and C2 tyres; remaining centres anticipate completion by mid-year. Indoors, two of six ETRTO test centres completed tests with others expected finished by mid-year. An intermediate report with available data will be presented in September 2026, full results postponed to February 2027, and the Working Document with test method evolution now expected in September 2027 instead of February 2027. |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 05 Feb 26 |
| 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: Tyre Noise Level Alignment status report |
| Reference Number: GRBP-83-26 |
|
The GOIE on Tyre Noise Level Alignment in UN R117 targets reducing dispersion of measurements for tyres of Class C1 and C2 and investigating possibility to develop a test method with an SRTT as reference. An intermediate report will be presented to GRBP in September 2026, with a Working Document proposing evolution of the test method by September 2027. Five meetings have been held with 13 test centres from France, Japan, Netherlands, Spain and ETRTO. Eight of thirteen test centres have completed tests on 15 C1 and 5 C2 Japanese market tyres, with completion targeted for mid-2026. |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 05 Feb 26 |
| 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 |
| Wet Grip on Worn Tyres informal group status report to GRBP |
| Reference Number: GRBP-83-31 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 06 Feb 26 |
| 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 |
| Documents submitted to GRBP on tyre regulations |
| Reference Number: GRBP-83-33/Rev.1 |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 06 Feb 26 |
| Relevant to: UN Regulation No. 75 | Motorcycle and Moped Tires, UN Regulation No. 106 | Tires for Agricultural Vehicles, UN Regulation No. 108 | Retreaded Tires for Motor Vehicles, UN Regulation No. 109 | Retreaded Tires for Commercial Vehicles, UN Regulation No. 117 | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance, UN Regulation No. 186 | Tyre abrasion test method development, and UN Regulation No. 172 | Retreaded tyres: Snow performance and/or traction classification |
| Click here to view the full document file |
| UN R117: Proposal for a Supplement 18 to the 02 series of amendments |
| Reference Number: GRBP-83-43 |
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Proposal to amend paragraph 2.18. to update Standard Reference Test Tyre definitions to ASTM International standards: E1136-19 for SRTT14, F2493-24 for SRTT16, F2872-25 for SRTT16C, F2871-25 for SRTT19.5, F2870-23 for SRTT22.5, F3678-25 for SRTT19.5 siped, and F3677-23 for SRTT22.5 siped. Also amend paragraph 12.21. to accept existing type approvals and grant extensions to class C3 tyres using either SRTT19.5 or SRTT22.5 before 1 September 2028, and use SRTT19.5 siped or SRTT22. |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 11 Feb 26 |
| 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 to supersede GRBP/2025/28 |
| Reference Number: GRBP-83-48/Rev.1 |
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Proposal to supersede GRBP/2025/28, consolidating amendment proposals from GRBP/2025/28, GRBP-82-27, GRBP/2026/6, and GRBP-83-20-Rev.2. Changes include moving tyre abrasion provisions to a separate UN Regulation, deleting paragraphs 5.7 to 5.10 and Annex 10, updating ASTM standard references to F2872-25, F2871-25, and F3678-25, amending Annex 5 part (b) paragraph 1.1.1., and deleting paragraph 2.21. defining abrasion performance terms. |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 10 Feb 26 |
| 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 4 to the 04 series of amendments |
| Reference Number: GRBP/2026/6 |
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Proposal to update references the latest international standard specifications ASTM |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 28 Nov 25 |
| 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 |
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| 5. (e) | UN Regulation No. 117 (Tyre Rolling Resistance, Rolling Noise and Wet Grip) |
| 5. (g) | Tyre Abrasion |