How does it work?
This graph shows an ergo-training for the FLUX Smart with a certain gear setting (39 tooth front chainring and a 19 tooth rear cassette). It illustrates the amount of wattage (power level) that the Tacx FLUX Smart can produce in the specified gear setting with a certain cadence. The blue shape represents the available resistance levels of the FLUX Smart. For example, at a cadence of 75 RPM, the FLUX Smart can power up to 400 watts in the 39-19 gear setting. This trainer cannot produce power levels below or above this shape, in this gear setting. If you wish to do so, you have to shift your gears. For example, at a cadence of 75 RPM you have an output of 100W. If you wish to ride with a lower wattage, you need to change gears; between 21 and 28 tooth.
Please note, using another gear setting will change the starting point; the lowest and highest possible power level at 0 RPM. This way you can determine what the best gear setting should be for your training.