European Tyre and Rim Technical Organisation
6 Feb 2025 Supporting material for ETRTO working documents (ETRTO) GRBP-81-13/Rev.1 2025-02-06 ETRTO
21 Feb 2025 UN R172: Proposal to supersede document GRBP/2025/17 (ETRTO) GRBP-81-27/Rev.2 2025-02-21 ETRTO
28 Nov 2025 UN R172: Proposal for a 01 series of amendments (ETRTO) GRBP/2026/10 2025-11-28 Proposal to:<ol class="alpha"><li>Clarify that the “supplier of the tread used for the retreading process” is responsible for conformity of production of the supplied tread,</li><li>Align the classification “traction tyre” with UN R117</li><li>Provide transitional provisions to manage the switch from the requirements given in paragraph 6.2.1. to the ones given in the paragraph 6.2.2.,</li><li>Correct the omission of provisions for “professional off-road tyre” and their alignment with UN R30,/li><li>Correct a reference to "Appendix 1" of the 1958 Agreement to "Schedule 1", and</li><li>Manage the transition to the new standard reference test tyres (SRTTs) 19.5 and 22.5 siped</li></ol> ETRTO
28 Nov 2025 UN R172: Proposal for Supplement 2 (ETRTO) GRBP/2026/11 2025-11-28 Proposal to reinsert requirements for the classification of tyres of class C1 that were erroneously omitted in the amendments to para. 6.4. introduced via Supplement 1 and to align the wording with UN R30, to correct a reference to "Appendix 1" that should read "Schedule 1", and to delete the field for "Extension No." in the Communication form since the extension is already integral to the Approval Number. ETRTO