Preliminary tests using the draft GTR procedures on tires in the US market have raised concerns that a wet traction index value requirement for “all-season tires” (as used in the US) will be needed since these tires fall outside the tire types addressed by the GTR. The US proposes language to address this situation.

Preliminary report prepared by France on the development of a global technical
regulation concerning uniform provisions for pneumatic radial tyres for passenger and light truck (commercial) vehicles.

Text of the new GTR on light vehicle radial tires as adopted by the Working Party on Brakes and Running Gear (GRRF) at its 74th session.

The background report on the development of the first phase of the Global Technical Regulation concerning uniform provisions for pneumatic radial tyres for passengers and light truck commercial vehicles, submitted by GRRF for approval by the World Forum.