Proposal to

1. change measurement units for drum speed in Annex 7 from min^-1 to km.h^-1 to align the requirements with other tyre regulations;
2. correct wording from “speed category symbol” to “speed symbol” (as defined in para. 2.33);
3. correct wording from “load capacity index” to “load index” (as defined in para. 2.32);
4. correct a reference to para. 3.2.13. of the Regulation in Annex 7, Appendix 1;
5. correct a boundary value of load index in Annex 7, Appendix 1;
6. delete in paragraph 2.1 in Annex 7, the possibility to use the 2.0 m drum diameter to perform the endurance test; and
7. align the text of Annex 10 with Annex 7 of UN R117 pursuant to the adoption of Supplement 5 to the 02 series of amendments to that regulation.

Proposal to amend Annex 7 (based on the documents ECE/TRANS/WP.29/GRRF/2015/39 and GRRF-80-16 from Slovakia) and Annex 10. This proposal would:

1. change measurement units for drum speed in Annex 7 from min-1 to km.h-1 to align the requirements with other tyre regulations;
2. correct the wording from “speed category symbol” to “speed symbol” (as defined in para. 2.33);
3. correct the wording from “load capacity index” to “load index” (as defined in para. 2.32);
4. correct a reference to para. 3.2.13. of the Regulation in Annex 7, Appendix 1;
5. correct a boundary value of load index in Annex 7, Appendix 1;
6. delete in paragraph 2.1 in Annex 7, the possibility to use the 2.0 m drum diameter to perform the endurance test.

In Annex 10, the proposal aligns the text with Annex 7 of UN R117, 02 series of amendments, Supplement 5.

Proposal to clarify provisions for the minimum heights for markings for tyres with nominal rim diameter codes ≥ 20 and nominal section width ≤ 235 and for tyres with nominal rim diameter codes < 20 and nominal section width > 235. The proposal also corrects tables and figures for the use of lowercase letter to denote tyre dimension specifications.

Pursuant to Supplement 21 to UN R54 replacing PSI with kPa to indicate tyre inflation pressures, UN R109 requires updating. This proposal would allow both markings under UN R109 because the life cycle of the carcasses spans several years.

In document GRRF/2016/40, an ellipsis “…”, indicating that the remainder of the sentence was to be retained, was omitted in the proposed amendment to paragraph 3.2.1. As a result, the remaining text was unintentionally removed following adoption of the proposal. A similar error resulted from the adoption of document WP.29/2017/9 regarding paragraph 4.9.2. This proposal also reintroduces the unintentionally deleted text.

Comments on the proposals prepared by BIPAVER, France and Netherland to align the test procedures for retreaded tyres with the latest amendments to R30, R54 and R117.

ETRTO detected an issue in document ECE/TRANS/WP.29/2022/7 with the insertion of paragraph 3.5.1. that is the consequence of the alignment between UN Regulation No. 54 and UN Regulation No. 109. This new requirement regarding the marking position in the sidewall for retreaded tyres is creating a burden for the retread industry that will potentially need to adapt all their moulds accordingly, without considering transitional provisions.

The prescription given in paragraph 3.5.2., which will be implemented through document WP.29/2022/7/Rev.1 adopted by WP.29, contradicts the previously existing prescription in paragraph 3.2.9. This proposal aims to resolve the contradiction by amending paragraph 3.5.2. to introduce a reference to the prescriptions given in paragraph 3.2.9.

Proposal to supersede GRBP/2023/10 with a more flexible approach appropriate for covering the operations of small retreaders.

Proposal from a small group effort for uniform provisions concerning the approval of pre-cured tread materials which are used for producing retreaded tyres or the approval of retreaded tyres produced by using mould cure process with regard to their snow performance.

Small group proposal to split retreaded tyre requirements into a new UN Regulation.

Small group (France, Netherlands, ETRTO, BIPAVER) proposal to restructure retreaded tyre requirements and regulations.

This consolidated document amends and supersedes GRBP/2024/11.

Consolidated version including the amendments proposed with document ECE/TRANS/WP.29/GRBP/2024/03 amended by GRBP-79-26..

Proposal to replace document ECE/TRANS/WP.29/GRBP/2024/03

Consolidated version including the amendments proposed with document ECE/TRANS/WP.29/GRBP/2024/11 amended by GRBP-79-28-Rev.1.

Proposal to:

1. Correct the description of a tyre to exclude aspects outside the scope of UN R109
2. Clarify the definition of nominal rim diameter
3. Clarify the definition of principal grooves in line with the proposal for UN R54
4. Amend para. 6.4.4.2. to clarify that the UN R117 certificate may be used for obtaining the type approval under UN R172 of retreaded tyres classified as traction tyre
5. Simplify the wording of the requirements for professional off-road tyres
6. Replace “XXX” with the UN Regulation No. 172 in the references to the approval of retreaded tyres with regard to their snow performance and/or classification as traction tyre.

Proposal to delete the term “Supplier of the tread used for retreading process”, to delete “material manufacturer” in favor of “material supplier”, to simplify the list of tyres classified as a tyre for use in severe snow conditions and/or as traction tyre, to introduce a paragraph clarifying that the supplier of tread material dedicated to the retreading of tyres categorized as special use tyres shall provide to the retreader the “void to fill ratio” pertinent to such tread material, to correct a reference to “Appendix 2” to refer to “Schedule 1” of the 1958 Agreement, to delete the field for “Extension No.” in the Communication form since the extension is already in the Approval number, and to align wording with UN R54.