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- Transport - Vehicle Regulations
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- Working Party on Noise and Tyres (GRBP) (Former GRB)
- Wet Grip on Worn Tyres (WGWT)
- IWG WGWT - previous sessions (2019-2022: UNR117.03&04)
- IWG Worn Tyres session 39
- Attachments
- WT-39-03 ETRTO threshold proposal for C2 and C3 wet grip in worn state.pptx
WT-39-03 ETRTO threshold proposal for C2 and C3 wet grip in worn state.pptx
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