GRBP/2025/9
UN R30: Proposal for Supplement 27 to the 02 series of amendments
UN R30: Proposal for Supplement 27 to the 02 series of amendments
Proposal to:
Update reference to ISO 4000-1:2024 (published in March 2024)
Clarify the structure indication within the tyre size designation for run flat or self-supporting tyres suitable for speeds in excess of 240 km/h (inscription “ZRF”)
Clarify the nominal rim diameter.
Amend the definition of principal grooves by eliminating the circular reference between this definition and the position of tread wear indicators.
Introduce definition of tread depth (used in the requirements for special use and professional off-road tyres)
GRBP will address amendment proposals by the expert from the European Tyre and Rim Technical Organization (ETRTO) that clarify several definitions and make editorial changes.