Luchtweerstand - 3.

Van de site van Hed:

"A. Let's look at a few figures. Assume a rider uses a conventional bike over a 25 mile flat course time trial. He weighs 150 lb, his bike is another 20 lb, and he is producing 185 watts of power. The aero drag with this scenario would be approximately 6.5 lb using aero bars into a 2 mph headwind of between 0 and 5 degrees. With his standard bike, our rider's time would be around 1 hour 7 minutes and 38 seconds. If we reduced the weight of his bike by three pounds, that time would come down by just 3 seconds. However, swap the wheels to an aero design and the drag could be reduced to 6 lb. Even with the additional quarter pound weight of the new wheels, his time saving over 25 miles jumps dramatically to over 1 minute 30 seconds. No contest."

Dat scheelt toch wel flink! 185 watt trap ik ook wel.