Proposal to make a correction to the procedure of free rolling tyre noise testing described in Annex 8.
Supplement 7 introduced an inconsistency in R51.03 Annex 8. As currently written, it requires free-rolling tyre noise testing to be conducted in accordance with both ISO 362-3:2016 and Annex 3, Appendix 3
Proposal replaces document GRBP/2025/20
Proposal to clarify the specification of the abrasion test machine.
Proposal to define a reduced vision zone I for vehicles of categories M and N other than M1.