| UN R117 Tire Noise, Wet Adhesion, and Rolling Resistance | Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance | Uniform provisions concerning the approval of tyres with regard to rolling sound emissions and/or to adhesion on wet surfaces and/or to rolling resistance Tire Noise, Wet Adhesion, and Rolling Resistance Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance UN Regulation No. 117 UN R117 | UNR | 117 |