Proposal to:

1. Correct the description of a tyre to exclude aspects outside the scope of UN R109


2. Clarify the definition of nominal rim diameter


3. Clarify the definition of principal grooves in line with the proposal for UN R54


4. Amend para. 6.4.4.2. to clarify that the UN R117 certificate may be used for obtaining the type approval under UN R172 of retreaded tyres classified as traction tyre


5. Simplify the wording of the requirements for professional off-road tyres


6. 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.