One of the fundamental laws of physics is that an object at rest tends to want to stay at rest, while an object in motion tends to want to stay in motion. When your car is sitting still, a significant amount of the energy it produces must be expended to set it in motion.
Ironically, by their very nature your tires tend to want to resist rolling. After all, they are also responsible for stopping your car, as well as holding it to road when you change directions. In order to get your tire moving, it is estimated that from five to 15 percent of your fuel consumption goes to overcoming your tires’ rolling resistance.
In an effort to reduce fuel consumption, tire manufacturers have developed what are known as low rolling resistance tires. Through observing the behavior of a tire as it wears, manufacturers noticed that a worn tire demonstrates less rolling resistance than a new one. However, the trade-off is reduced handling and braking capability, which of course could lead to dangerous situations.
Low rolling resistance tires return better fuel economy, without the trade-offs in handling and braking capability.