I have question regarding setup Trainerroad app. I would like use virtual power option with spin bike. I connected speed and cadence sensor to bike Finnlo Speedbike CRT, but i do not know what virtual power option choose. If somone of you using also spinn bike with mechanical brake let me know haw you setup application.
If that is a bike with a typical hand controlled brake for resistance, Virtual Power will never work right. It assumes a fixed resistance curve with respect to wheel speed.
Since most spin bikes are quickly and easily adjustable, there is no way to correlate speed with any related virtual power estimate.
I tried virtual power, and as @mcneese.chad says, never got it right.
Now I have a power meter (pedals) on the spin bike, and that works great!