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Document Title UN R30: Proposal for Supplement 27 to the 02 series of amendments
Reference Number WP.29/2025/68
Date
9 Apr 2025
Summary Proposal to:
  1. Update reference to ISO 4000-1:2024 (published in March 2024)
  2. 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")
  3. Clarify the nominal rim diameter.
  4. Amend the definition of principal grooves by eliminating the circular reference between this definition and the position of tread wear indicators.
  5. Introduce definition of tread depth (used in the requirements for special use and professional off-road tyres)
  6. Clarify the calculation of tyre section width
  7. Claify the Dmax requirement for snow tyres.
Rulemaking Area(s) UN R30 Pneumatic Tires
Regulatory Impact
02 series of amendments | Supplement 27
Proposal Status Adopted by WP.29
Meeting(s)
Related Documents
GRBP/2025/9 UN R30: Proposal for Supplement 27 to the 02 series of amendments (superseded)
GRBP-81-05/Rev.1 UN R30: Proposal to supersede document GRBP/2025/9 (superseded)
GRBP/79 Report
Downloads
UNECE server .pdf format .docx format
GAR server .pdf format .docx format
Excerpts from session reports related to this document
WP.29 | Session 196 | 23-27 Jun