Tire narrow can effectively reduce the resistance, what is the specific principle of what? Slip friction and pressure, friction coefficient, and area has nothing to do. The The But I know it must not be explained here
The latest trend is that 25,27 or even wider super fat laps are popular. With the lifting of UCI, disc brake in the road are fully open. Without the limit of the highway clip, the rim can be made wider.
It is not necessarily the narrower the better, the trend is now 25C tires, because the use of fat ring carbon fiber wheel when the wind resistance than other sizes lower, in the high tire pressure rolling resistance but small, and cornering Have better grip.
The wheels are fine at weight loss, which helps to reduce wind resistance, both of which are overwhelmingly important on road vehicles. Other conditions such as weight, tire pressure and so exactly the same, and only the tire thickness is different, the drag difference is not big. In this paper, the drag does not include wind resistance.