The Working Party on Noise and Tyres (GRBP) is invited to consider a proposal by the experts from the International Motorcycle Manufacturers Association (IMMA) that aims at avoiding different interpretations of the gear used during the Conformity of Production (CoP) testing.
GRBP/2025/19 | UN R41: Proposal for a Supplement to the 04, 05 and 06 series of amendments |