Referred to as sport bias motorcycle tires, these usually have a radial-style tread patterns that give it a larger tire "footprint", (contact with the road surface). Sport bikes are usually made to be run hard on the road, and maybe even do some off-road duty. Proper adherence to the surface contact with the ground and excellent cornering are required for this style of road bike. Having to perform in various weather environments is an issue of concern too.
To give these tires better grip in both wet and dry environments there must be an overall Increase in the tread-to-void ratio . Maximum tread life is desired for sport bike riders as well. Over the last twenty years unique tread compounds have been discovered and this has increased both features, those being increased grip and improved wear resistance