Korea Energy Consumption Efficiency Labeling and Standard
In order to enable consumers to easily purchase efficient energy-saving tires, the tire energy consumption efficiency grading system consists of the energy consumption efficiency grade meter and the lowest energy consumption efficiency standard.
*According to energy efficiency and consumption of the tire, the tire is required to indicate an energy efficiency grade from 1st to 5th grade
*Minimum energy performance standard is mandatory
RR: Rolling Resistance
Tire rolling resistance is the energy that your vehicle needs to send to your tires to maintain movement at a consistent speed over a surface. In other words, it is the effort required to keep a tire rolling. The main contributor to rolling resistance is the process known as hysteresis. Hysteresis is essentially the energy loss that occurs as a tire rolls through its footprint. The energy loss must be overcome by the vehicle’s engine, which results in wasted fuel. Low rolling resistance tires can be much more fuel-efficient tire than conventional tires.
Wet Grip
The most important role of a tire is to provide safety - in all conditions. Wet adherence or grip is one of the most important performance characteristics. Wet grip is the braking performance that occurs when the driver attempts to stop the vehicle on a wet and rainly road. Generally tire with low rolling resistance has an advantage in fuel economy, but it can lead to poor braking stability on wet surfaces because of the low tightness with the wet surfaces..
Pass by Noise
Measure the size of the out-of-vehicle noise between the tires and the road surface when the vehicle is driven and report it to ensure that it meets the noise tolerance criteria. It is a system that introduces and manages tire noise tolerance standards for noise reduction and low noise tire supply.
*It is mandatory only for tire with new launching vehicle on January 1, 2020