Proposal to delete Table of contents, Annex 10 and all its appendices, amend para. 1.1. to clarify application to new pneumatic tyres of classes C1, C2 and C3 in new state regarding sound emissions and rolling resistance and in new and worn state regarding wet adhesion, delete para. 1.3., amend para. 2.18. to specify reference tyres F2872-25, F2871-25, F3678-25 and F3677-23, delete para. 2.21., delete para. 3.1.1.1., amend para. 3.2.1. to describe major features and their effects on tyre performance, delete paras. 5.7. to 5.10., delete Annex 1 items 8.6. and 8.6.1., amend Annex 5 part (b) para. 1.1.1. to establish surface friction values by trailer or vehicle method according to tyre class and SRTT, amend Annex 5 part (b) para. 1.1.1.1. regarding coefficient of variation and peak braking force coefficient, and delete Annex 10. Document based on GRBP/2025/28, GRBP-82-27, GRBP/2026/6, GRBP-83-20/Rev.2 and GRBP-83-48/Rev.1.

Proposal to amend para. 2.18. to update Standard Reference Test Tyre definitions with ASTM International standards E1136 19, F2493 24, F2872 25, F2871 25, F2870 23, F3678 25, and F3677 23 for specified tyre sizes and designations, and amend para. 12.21. to permit Contracting Parties to continue accepting existing type approval and extensions to existing type approvals of class C3 tyres first granted before 1 September 2028 using SRTT19.5 or SRTT22.5, with SRTT19.5 siped or SRTT22.5 siped required for new tests performed on different representative tyre sizes for extensions granted after 01 September 2028.