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Document Title
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UN R54: Proposal for Supplement 28
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Reference Number
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GRBP/2025/10
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Date
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Summary
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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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Source(s)
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ETRTO
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Rulemaking Area(s)
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UN R54 CV Tires
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Proposal Status
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Superseded
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Meeting(s)
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Related Documents
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GRBP-81-06/Rev.1
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UN R54: Proposal to supersede document GRBP/2025/10
(superseded)
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GRBP-81-13/Rev.1
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Supporting material for ETRTO working documents
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WP.29/2025/71
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UN R54: Proposal for Supplement 28
(adopted)
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Downloads
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UNECE server
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.pdf format
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.docx format
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GAR server
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