Brick Snotshoulders
It _can_ be calculated based on speed and terrain. Here's an online calculator https://www.kreuzotter.de/english/espeed.htm.
Bear in mind that the calculation is only as accurate as the numbers you give it, and that some of the numbers are nigh-impossible for a normal person to be accurate with (frontal area, coefficient of drag, wind speed...) but it can get you into the ballpark.
Bear in mind that the calculation is only as accurate as the numbers you give it, and that some of the numbers are nigh-impossible for a normal person to be accurate with (frontal area, coefficient of drag, wind speed...) but it can get you into the ballpark.
Oldbie bike racer
www.analyticcycling.com has the online tools to calculate power too.
Even a 3mph wind makes a difference in power. Some people will do an out and back test to help account for slope and wind.
-Warren
Even a 3mph wind makes a difference in power. Some people will do an out and back test to help account for slope and wind.
-Warren