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Old 11-29-16, 09:53 AM
  #14  
redfooj
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if its a dumb trainer its about the power curve model, and also its variance to your actual trainer

if its a smart trainer, i think theyre often known to vary non-insignificantly from power measured at crank/chains/hubs

further, relating power vs speed on flats, it depends on the aerodynamic model compared to how aerodynamic you are in the real life

and lastly, on hills, i think by default zwift uses some sort of hill-assist / 50% difficulty type thing to lower work needed to get up the hills

so yeah lots of ways to go wrong. tho overall speaking, with my smart trainer, i found the overall speed per perceived effort pretty good approximation. wont have real life power meter until later to compare. but in the end, its all about training and work done, isnt it...not speed simulation
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