| RD-ASEP informal group status report to GRBP |
| Reference Number: GRBP-83-06 |
|
IWG RD-ASEP status report to GRBP-83 after the 10th session in December 2025. Work on RD-ASEP for UN R51 is developing a mandatory procedure after the monitoring phase, while R41 work has concluded. The Data Analysis Task Force reported on database sufficiency, boundary conditions, CVT vehicle modelling, and potential inclusion of N2/N3/M2/M3 vehicles. An Editing Task Force created a consolidated R51.04 draft reviewed in December. IWG RD-ASEP recommends no monitoring requirements be approved without corresponding mechanisms to collect, analyze, and report results. M category/R51 informal document submission expected September 2026 and working document February 2027. L-category/R41 requires no further action. |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 20 Jan 26 |
| Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions |
| Click here to view the full document file |
| Informal meetings in conjunction with the 83rd GRBP session |
| Reference Number: GRBP-83-02 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 21 Jan 26 |
| Click here to view the full document file |
| List of GRBP priorities |
| Reference Number: GRBP-83-07 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 22 Jan 26 |
| Click here to view the full document file |
| AVRS task force status report to GRBP |
| Reference Number: GRBP-83-12 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 05 Feb 26 |
| Relevant to: WP.29 Regulatory Project | Review of Regulations for Applicability to ADS Vehicles |
| 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 |
| UN R64: Proposal to amend document GRBP/2026/2 |
| Reference Number: GRBP-83-10 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 05 Feb 26 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 64 | Temporary-use Tires and WP.29 Regulatory Project | Review of Regulations for Applicability to ADS Vehicles |
| Click here to view the full document file |
| UN R172: Proposal to amend document GRBP/2026/11 (extended version) |
| Reference Number: GRBP-83-18 |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 05 Feb 26 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 172 | Retreaded tyres: Snow performance and/or traction classification |
| Click here to view the full document file |
| UN R172: Proposal to amend document GRBP/2026/11 (condensed version) |
| Reference Number: GRBP-83-17 |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 05 Feb 26 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 172 | Retreaded tyres: Snow performance and/or traction classification |
| 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 |
| UN R156: Review of regulations relevant to software updates |
| Reference Number: GRBP-83-36 |
| Submitted by: France |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 06 Feb 26 |
| Relevant to: UN Regulation No. 156 | Software Update Processes and Management Systems |
| Click here to view the full document file |
| Highlights from the recent WP.29 and ITC sessions of relevance to GRBP |
| Reference Number: GRBP-83-05/Rev.1 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 06 Feb 26 |
| 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, and UN Regulation No. 172 | Retreaded tyres: Snow performance and/or traction classification |
| Click here to view the full document file |
| GRBP-83: Updated provisional agenda for the February 2026 session |
| Reference Number: GRBP-83-01/Rev.1 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 10 Feb 26 |
| Click here to view the full document file |
| Position on tyre abrasion |
| Reference Number: GRBP-83-30 |
| Submitted by: OICA |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 10 Feb 26 |
| Relevant to: UN Regulation No. 186 | Tyre abrasion |
| Click here to view the full document file |
| UN R51: Proposal to amend document GRBP/2026/4 |
| Reference Number: GRBP-83-09/Rev.1 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 10 Feb 26 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions |
| Click here to view the full document file |
| RD-ASEP informal group status report to GRBP |
| Reference Number: GRBP-83-08/Rev.1 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 10 Feb 26 |
| Relevant to: UN Regulation No. 51 | Vehicle Noise Emissions |
| Click here to view the full document file |
| GRBP: General information for the 83rd and 84th sessions |
| Reference Number: GRBP-83-04/Rev.1 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 10 Feb 26 |
| Click here to view the full document file |
| GRBP: Running order of the agenda for the 83rd (February 2026) session |
| Reference Number: GRBP-83-03/Rev.1 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 10 Feb 26 |
| Click here to view the full document file |
| UN R109: Proposal to amend document GRBP/2026/12 (condensed version) |
| Reference Number: GRBP-83-21/Rev.2 |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 11 Feb 26 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 109 | Retreaded Tires for Commercial Vehicles |
| Click here to view the full document file |
| UN R109: Proposal to amend document GRBP/2026/12 (extended version) |
| Reference Number: GRBP-83-22/Rev.2 |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 11 Feb 26 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 109 | Retreaded Tires for Commercial Vehicles |
| Click here to view the full document file |
| UN R172: Proposal to amend document GRBP/2026/10 (Extended version) |
| Reference Number: GRBP-83-16/Rev.1 |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 11 Feb 26 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 172 | Retreaded tyres: Snow performance and/or traction classification |
| Click here to view the full document file |
| UN R106: Proposal to replace document GRBP/2026/8 |
| Reference Number: GRBP-83-19/Rev.1 |
|
Proposal to supersede the text for a Supplement 22 presented in document GRBP/2026/8. |
| Submitted by: ETRTO |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 11 Feb 26 |
| Document status: Superseded |
| Relevant to: UN Regulation No. 106 | Tires for Agricultural Vehicles |
| Click here to view the full document file |
| Tyre abrasion: Overview of proposed Annex 4 (Test method equivalence) |
| Reference Number: GRBP-83-45 |
| Submitted by: EC |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 11 Feb 26 |
| Relevant to: UN Regulation No. 186 | Tyre abrasion |
| 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 |
|
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 |
| Tyre Abrasion task force status report to GRBP |
| Reference Number: GRBP-83-44 |
| Meeting Sessions: 83rd GRBP session (10-13 Feb) |
| Document date: 11 Feb 26 |
| Relevant to: UN Regulation No. 186 | Tyre abrasion |
| Click here to view the full document file |