Professional cyclists know that riding on flat ground is the battle with the air.Accordong to a test,
When a rider rides at a speed of 30 kilometers per hour on flat ground, about 80% of the resistance comes from the air.
When the riding speed is increased by 2 times, the resistance of the air will be increased by 4 times, and the cyling force required will be increased by 8 times (that is, the resistance multiplied by the speed)! Therefore, the power required to ride a bicycle will increase sharply as the speed increases. In other words, a small difference in speed can actually make a huge difference in the effort required.
70%-80% of the air resistance during racing is man-made. Generally speaking, the smaller the area seen from the front, the smaller the resistance. The measure that people take is exactly to change riding posture for this reason. This is not for fun but to greatly reduce air resistance. If adjusted to the limit, the air resistance can be reduced to 60% of the normal position.
The triathlon/time trial bike is designed to help athletes change their riding posture, reduce the windward area, and achieve the purpose of reducing wind resistance. The same purpose can also be achieved by adding a extension bar to the road bike.
Besides the frame design, the wheelset also has a major influence. As the wheel rotates, the spokes also stir the air to rotate, plus the double effect of the wind coming from the front, the resistance increases, so its influence also increases. Making the cross-section of the spokes streamlined, reducing the number of spokes, etc. are all to reduce air resistance. rim brake carbon wheel disc brake carbon wheel carbon disc wheel
In addition, the resistance generated by the human body also cannot be ignored. Including wearing a pneumatic helmet, shaving body hair, etc., can reduce wind resistance.
