R.W.I System(Rotate Wear Indicators) -The Customer can monitor the life of the tread by watching the Rotate Wear Indicator numbers.
-The customer can also visually monitor the type of tread.
By monitoring, the customer determine if misalignment or other mechanical problems may be causing uneven wear.

Improved wet performance -Application of notches prtecting water turbulance through longitudinal grooves.
-Slashed sipes in the lateral grooves for improving water removal.

Good performance though worn out -Though KU31 is worn on and on, it maintain its unique performance continuously.
-Especially, even wear of KU31 suppress the harsh noise level that is generated as time goes on.