This is a tire for a racing bike, also called a road bike. These types of bikes are designed to be ridden on pavement and for going very fast, and their tires are part of that strategy.
To minimize friction with the ground, road bike tires are smooth, with no tread. They are also inflated to a very high air pressure, often in the range of 110-120 psi. This makes them very hard, so that they roll more efficiently.
Because bike racers want their bikes to be as light as possible, road bike tires are often thinner than tires you'd use for everyday riding. Though this keeps the weight down, they can also wear out more quickly.
