The asymmetric tread design's even pressure distribution avoids irregular and premature wear formations, extending the tread life. The tread also features Tuned Performance Indicators, which show the tire's performance in Wet, Dry and Snow condition. The letters W, D and S are visible on the tread, and they wear along with the tread. Once the letter representing the weather condition is worn out, the tire is no longer safe to be used in such weather situations. For example, once the S wears away, the tire loses its winter weather driving safety.