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GRBP is invited to consider draft amendments submitted by the expert from ETRTO with the aim to clarify several definitions and to make editorial changes.
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GRBP/2025/10 | UN R54: Proposal for Supplement 28
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UN R54: Proposal for Supplement 28
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Reference Number: GRBP/2025/10
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Proposal to - 1. Add a generic reference to the Consolidated Resolution on the Construction of Vehicles (R.E.3) in footnote 1
- Make editorial corrections to the type of tyre and additional service description definitions
- Clarify the definition of nominal rim diameter (in line with the proposal for amending UN R30)
- Amend the definition of principal grooves (in line with the proposal for amending UN R30
- Introduce a definition for tread depth (used in the requirements for special use and professional off-road tyres)
- Introduce definition for free rolling tyre and front axle, and related revision of markings (ref. GRBP-80-03 and GRBP-80-26)
- Clarify the Dmax requirement for snow tyres
- Simplify rhz wording of the requirements for professional off-road tyres
- Add an indication for whether a special use tyre is a professional off-road tyre to the communication form (in line with UN R30).
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Submitted by: ETRTO
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Meeting Sessions: 81st GRBP session (18-21
Feb 2025)
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Document date: 04 Dec 24
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Document status: Superseded
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Relevant to
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View full document file for more information
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GRBP-81-06/Rev.1 | UN R54: Proposal to supersede document GRBP/2025/10
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