Originally Posted by
beng1
So it is not sensible to think that man can land rovers on Mars and has been designing bicycles for a few hundred years, and developing digital technology for seventy years, and should also be able to manufacture an accurate exercise bicycle. Okay...........
Power is power - 170W is 170w regardless of type of bike.
But outside conditions vary greatly, indoor bike is steady. No wind, no hills, no weather...
The closest thing to reality would be a smart trainer connected to Zwift - where zwift feeds resistance data back to your trainer. In order to do 19.5 here, you need 195w, or 225w because of headwinds or grade.
A static trainer has very little correlation to real world conditions - except power.
For example, my last 19.5 mph outdoor ride was 227W average for 1.5 hours. 227W on my turbo trainer, with my bike and the same power meter pedals, is like 24MPH.