The current text of UN R54 does not encompass the case where a tyre designed for a “special” application can also fulfil the definition of a “snow” tyre. This proposal would allow for such tyres to be marked with the inscription M+S, M.S, or M&S while remaining in the category of use “special”.

Proposal to:

• correct the code 19 rim diameter, amend the tyre dimension requirements,
• modify the marking requirements to replace PSI with kilopascals (“kPa”),
• change the measurement units for drum speed from min-1 to km.h-1 and align the wording in Annex 7, Appendix 1 with the text of the Regulation,
• add new tyre sizes to Annex 5, allow for special tyres that can also be used as snow tyres to be marked with the inscription M+S, M.S, or M&S while remaining in the category of use “special”,
• align definitions and content with the other tyre regulations (UN Regulations Nos. 30, 117, 75 etc.),
• include a definition of “manufacturer” extracted from the resolution “R.E.3”
• adopt a common definition and use of the terms “Manufacturer’s name”, “Brand name”, “Trademark”, “Trade description” and “Commercial name” and their links, and
• add information in the certificate to enable approval authorities to more easily understand the products the certificate addresses.