EUROPEAN TIRE LABEL

All new tires, produced after 1st July 2012, and to be sold at point of sale in EU countries after 1st November 2012; must follow EC NO 1222/2009 labeling criteria, and should be labeled with stickers to give the information.
The aim is to im prove driving safety, fuel efficiency, and lower noise levels. This regulation allows consumers to make more informed choices when purchasing tires by considering these ranking.

Source from ETRMA
http://www.etrma.org/tyres/tyre-labelling

RRC (Rolling Resistance Coefficient)
  1. Lower rolling resistance contributes to fuel saving and less carbon dioxide emission.

  2. Grade A: most efficiency

  3. Grade G: least efficiency

  4. Choosing grade A the tire consume less fuel and carbon dioxide emission.

  5. Effect may vary among vehicles and driving conditions, but the difference between a G and an A level for a complete set of tires could reduce fuel consumption by up to 7.5% and even more in case of trucks.

Wet Grip
  1. Wet grip is an important indication for tire performance on wet road braking distance.

  2. Grade A: the shortest distance

  3. Grade G: the longest distance

  4. Choosing grade A indicates the tire could be shorter 30% braking distance than Grade G

  5. Effect may vary among vehicles and driving conditions, but in the case of full braking, the difference between a G and an A level for a set of four identical tires could be up to 30% shorter braking distance (e.g. for a typical passenger car driving at 80 km/h speed, this could be up to 18m shorter braking distance)

External rolling noise classes
  1. The external rolling noise is measured and declared in decibels (dB), and indicated in three levels. More black bars which mean the tires create more noise.