Fuel efficiency is a measure of the tyre's rolling resistance. A tyre with low rolling resistance is fuel efficient because it requires less energy to roll. Fuel efficiency is rated from A (highest rating) to E (lowest rating).
Aderenza sul bagnato
Wet grip measures the braking ability of the tyre on wet surfaces. Wet grip is rated from A (shortest stopping distance) to E (longest stopping distance).
The rolling noise of the tyre is measured in decibel. The black sound waves indicate the noise class from 1 (quiet) to 3 (loud).