I have a Tacx Genius Smart (latest firmware), calibrated correctly, which works fine until it comes to the Zwift Workouts. With ERG enabled the watts the unit is making me keep to is 8 - 10% higher than the level Zwift wants me to do for the interval.
This was fine at the start of my 12 week FTP builder as the watts required were quite low, but last night I did week 2 day 4 where I was supposed to maintain 230w for 5 minutes (My FTP is 265). I don’t change gear, I keep my cadence to 85 - 90 constant and keep progressions between intervals smooth. ERG mode was making me keep to 245 - 255 watts. As those of you who understand ERG mode, changing gear or cadence doesn’t help so by 40 minutes in I was completely spent (I have a cold so couldn’t maintain such a high % of my FTP)… Eventually I had to turn the ERG mode off and manually with gears and cadence keep the watts to the target which was fine.
Is this an issue with the turbo, or Zwift? I would assume Zwift, as surely it sees the higher watts and through ERG mode reduces the brake resistance to suit. I know many of you will say “Turn off ERG mode”, but if that’s the case I may as well have bought a cheap non smart trainer.
I have seen similar forums discussing this issue with the BKool Pro but found no resolution to this.
Help would be really appreciated as with ERG mode on I stand no chance maintaining the watts in the latter weeks of training when they sit around my FTP.