I want to start training using power output. The SRM and Powertap are just way too expensive. How does the computer calculate wattage? I realize it isn’t as accurate as a powertap, but I figure I will always be using the same level of accuracy. Any advice or input would be appreciated.
It only works with any accuracy when you go uphill for a long time. It uses the altitude and distance covered to do something very similar to what happens on www.analyticalcycling.com when you ask it to give your power for time, distance, and elevation. You would be better off just getting a known climb and timing yourself on it repeatedly and just using analyticcycling.com to calculate your power.