Entry into force: 04 series of amendments | Supplement 2
21 Feb 2025
UN R117 | 04 series of amendments | Supplement 2
Based on WP.29/2024/65 as adopted during the 193rd WP.29 session (24-28
Jun 2024).
Proposal to introduce measures to reduce variability in noise measurements and new test methods to measure tyre abrasion.
Entry into force as of 10 Jan 2025
Entry into force: 04 series of amendments | Supplement 1
15 Jan 2024
UN R117 | 04 series of amendments | Supplement 1
Based on WP.29/2023/76 as adopted during the 190th WP.29 session (19-22
Jun 2023).
Entry into force as of 5 Jan 2024
Entry into force: 04 series of amendments
6 Oct 2023
UN R117 | 04 series of amendments
Based on WP.29/2023/8 as adopted during the 189th WP.29 session (6-9
Mar 2023).
Proposal to revise the limits for rolling resistance and wet grip, to address tyres for vintage vehicles, to revise the definition for special-use C1 tyres, and to set the wet grip index threshold at 0.80 for class C1 tyres with a nominal aspect ratio equal to or less than 40, a section width equal to or higher than 235 mm and suitable for speeds equal to or greater than 300 km/h and for class C1 all terrain and special use tyres. The proposal also introduces the kworn factor in a new para. 3 in Annex 9 to address wet grip of C2 and C3 tyres in a worn state (see GRBP-75-26-Rev.1 for concept), provisions to allow the type approval of special use tyres that fulfil the requirements for snow performance as laid out in Annex 7, and a new definition of traction elements to characterize traction tyres.