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Document Title
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UN R108: Proposal for a Supplement to the 01 series of amendments
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Reference Number
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GRBP/2025/15
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Date
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Summary
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Proposal to:- Correct the description of a tyre to exclude aspects outside the scope of UN R108
- Align the snow tyre definition to UN R109 and 172
- Clarify the definition of nominal rim diameter
- Clarify the definition of principal grooves by eliminating the circular reference between this definition and the position of tread wear indicators
- Introduce a definition for tread depth (used in the requirements for special use and professional off-road tyres)
- Amend para. 4.1.5.3.2. to remove the retreaded reference to traction tyre classification because it is not applicable to tyre of class C1
- Clarify the calculation of the tyre section width
- Replace "XXX" with the UN Regulation No. 172 in the references to the approval of retreaded tyres with regard to their snow performance and/or classification as traction tyre.
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Source(s)
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ETRTO
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Rulemaking Area(s)
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UN R108 Retreaded 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Superseded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-81-11/Rev.1
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UN R108: Proposal to supersede document GRBP/2025/15
(superseded)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.29/2025/73
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UN R108: Proposal for Supplement 1 to the 01 series of amendments
(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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