Every professional motorcycle racer has a small obsession largely unknown to street and track riders, and even to ardent racing fans. That obsession is tires.
For the casual rider, getting a set of good quality tires and checking them before you ride is just part of routine motorcycle maintenance. For safety reasons, you replace them when there’s not much tread left. Some folks even wait until the metal cords show, they get a flat spot, or are just plain old.