Pairing. Screen.
3 Likes
If that were the case, though, wouldn’t the pairing screen actually be showing? I would think, though I’ve never tried it, that if you entered the pairing screen to stop your rider, they would just start rolling again on that sort of grade. (Unless the TD is really low, that is.)
Interesting point which I have never tried. But should a 0% TD prevent you freewheeling at speed the whole way down the Alpe at the same speed as someone freewheeling at 100%TD. I thought TD only applied to how power felt in respect of cadence and gearing. (Not that I want to get into a power and TD issue, there are plenty of those - just interested in freewheeling point )
TD makes no difference to the speed you freewheel downhill. Tested on the Radio Tower when I was going for the 100 kph badge.
1 Like
Really? My understanding of TD is that it, effectively, flattens the grade. So, a TD of 0 should be just like riding on a flat surface, whether going uphill or downhill in-game.
Is this not correct?
It changes the trainer’s perception of the grade, but the game still knows you are on a hill.
2 Likes
That is interesting. And it makes it even more peculiar than I thought as to why my avatar will roll to a stop on a -3% grade. That would never happen IRL.
Yeah that’s an unrelated oddity of the game… gravity varies by context? I don’t know why it works that way, but it does. Not related to TD as far as I know.
You are 100% correct. Game physics does not use TD at all.
The only thing that change with TD is the resistance setting on the trainer.
IRL = It is like changing your group set it does not change the hills.
2 Likes
Downhills are simulated by Zwift at half the actual gradient percentage. Then TD is applied on top of that. So a 10 gradient downhill is halved to 5% by Zwift, then if your TD is at the 50% default it gets halved again to 2.5% downhill.
2 Likes
I would clarify @Steve_Hammatt
Downhill RESISTANCE are simulated by Zwift at half the actual gradient percentage. Then TD is applied on top of that. So a 10 gradient downhill is halved to 5% by Zwift, then if your TD is at the 50% default it gets halved again to 2.5% downhill.
TD = Can of Worms 
2 Likes
This quirk is I think going away, perhaps in the next update. I think this applies to auto-braking that occurs when wattage drops below 10 watts(?), and it only evidently happens on group or solo rides (not in races).
Did it yesterday on that same corner more out of coincidence for non-Zwift reasons - hit A and you stop super quick as usual, then hit ESC and the pairing screen disappears and you stay still. My TD is around 50%
Has any AppleTV user ever seen the number sign at corner 10? Maybe it’s an Easter egg like the Yeti 
1 Like
Like Dan said, U turn does it. I do it all the time.
Or press A.
But why is the rider on the climbing side of the road (right side) with a negative grade? I guess the U turn might be part of that…