GRBP/2026/10
UN R172: Proposal for a 01 series of amendments

Proposal to:

  1. Clarify that the “supplier of the tread used for the retreading process” is responsible for conformity of production of the
    supplied tread,
  2. Align the classification “traction tyre” with UN R117
  3. 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.,
  4. Correct the omission of provisions for “professional off-road tyre” and their alignment with UN R30,/li>
  5. Correct a reference to “Appendix 1” of the 1958 Agreement to “Schedule 1”, and
  6. Manage the transition to the new standard reference test tyres (SRTTs)
    19.5 and 22.5 siped

UNECE server
Excerpts from session reports
GRBP | Session 83 | 10-13 Feb

29. The representative of ETRTO introduced ECE/TRANS/WP.29/GRBP/2026/10, as amended by GRBP-83-15-Rev.1, as shortened version, and GRBP-83-16-Rev.1, as expanded version.
30. GRBP adopted GRBP-83-16-Rev.1, entrusted the secretariat to make it as short as possible, and requested the secretariat to submit it to WP.29 and AC.1 for consideration and vote at the June 2026 sessions as draft 01 series of Amendments to UN Regulation No. 172.