TIRE RATING ICONS
Some tires have unique benefits, as showcased with specific icons. For example, the MICHELIN® Green X® Marking is a guarantee that the tire provides a level of energy efficiency among the highest in the market for its category without compromising traction and treadwear. Here is some of icons that we know of being used as of day from tire manufacturors.
COMFORT
DRY/SUMMER
LOAD
NOISE
PERFORMANCE
TREAD LIFE
Here are some more icons from "DOT" PDF .