How often do you ask yourself questions like: What if I would be 10% more aero? What if I lose those 2 kilograms? How much additional efforts (Watts) are needed with head wind?
HiAeroCycling has released its simplified cycling calculator to answer those questions. The simplification lies in the fact that “standard” conditions are assumed. More importantly simplified also encompasses a very easy way to compare two situations.
The calculator can be found here
Some typical examples of analysis (all assuming a standard rider of 70kg and a bike of 10 kg).
Q: How much energy do I burn cycling 10 km on a flat road without wind and cycling
with 200 W?
A: 250 kCal
Q: How much power should I deliver to maintain 30 km/hr on a flat road, without wind?
A: 141 W
Q: A climb with a slope of 5% and 5 km in length. Cycling with 200 Watt. What is the difference between 80 kg and 90 kg?
A: About 20 minutes (80 kg) vs. 22 minutes (90 kg)
Q: What is my speed with a head wind of 10 km/u (~ -3 m/s), power of 200 W, under normal position (0.30 m2) and a more aero position (0.25 m2)
A: 23.5 km/h vs. 25.5 km/h
It is clear that at higher speeds aerodynamics play a prominent role. Reducing your CdA brings much more benefits than trying to save a few grams with an expansive bike, or trying to push somewhat more Watts out of your legs.