1. Scope--This SAE Recommended Practice defines the best known techniques for evaluating dynamic passenger car and light truck tire driving traction in snow. There are many snow conditions which a typical driver will encounter that are not specifically addressed in this Recommended Practice. Dynamic driving traction in this Recommended Practice is under a narrow, controlled range of conditions of temperature, snow compaction and depth (commonly called the "Test Window") to minimize test variability. Tire rankings may differ on other types of snow and ice conditions.

1.1 Object--The object of this SAE Recommended Practice is to provide a uniform test procedure for measuring the dynamic driving traction of passenger car and light truck tires in snow.