I just did a race. Coming down the Volcano -5% grade, 0 watts, but my avatar didn’t tuck onto the top tube.
Does this not work in a race?
Perhaps you were on a TT bike?
I seem to remember reading somewhere it was dependent on a combination of speed and gradient before the tuck was triggered. I think you have to be going faster than something like 60-65kph on a -7% or steeper gradient – at least that is what seems to work for me. I’m sure someone will correct me on the exact numbers.
I’m handing over to the man who can:
https://zwiftinsider.com/supertuck/
Your avatar weight, speed and the gradient all add to the ‘tuck’
Ride On!
Ah… I think I was at 56 kph.