Draft in large group rides

I was in a group ride today with over 1000 entrants. My avatar rarely sat up in the saddle, despite being in a huge bunch for the whole 50km.

I know there is a limitation on the number of riders shown in the mini-map (I believe you only see the 100 nearest to you)

Is there a similar limitation on the draft, in a huge field? I’m not sure if I was rarely getting a draft, or whether I was getting one but the avatar animation to sit up in the draft was rarely working.

Does anyone know more about this? Thanks.

You have to be going at least 33kph. Also, Tron riders don’t sit up.

I didn’t know that about Tron riders. I presume they still get draft, even though they are not sitting up?

But anyway, we were going comfortably over 33kph for most of this ride; it was mostly flat.

Several people were asking if draft was even enabled for the ride, because they were seeing the same thing I guess. But riders did occasionally sit up, so I think it must have been.

I’m wondering if Zwift can’t cope with the draft calculations when there are that many people in a ride. Or maybe it’s just an issue with showing the animations.

Definitely can cope; as it only takes into account the nearest 100 riders to you (generally ahead, sometimes a handful behind), in all situations; so the remaining 900 other riders… wont’ really have an effect regardless, as the data of their existence isn’t even being sent to you; outside of chat, which is unrelated on the physics side of things.

As far as sitting up or not goes; was it a banded ride? Wonder if that produced some wonkiness.

Without knowing what the ride is, we can only make assumptions.
But it’s definitely not related to number of folks on a group ride; as again, Zwift only sends you data to 100 riders nearest you; draft benefit doesn’t really mean anything after somewhere around 6-8 riders if I recall.

Of course, type of bike matters as well; if it were open bike selection, and banded, folks could’ve been on MTBs, Buffalos, Tri, Concept, etc. which all have different animations (or lack them)

I’m going to bet this was the draft-enabled but on TT bikes 100km PR ride …

ETA: Dang! :unamused::laughing:

It was the Pas Normal “January Resolution Challenge Ride” on Sunday 5th.

My avatar did occasionally sit up, which is what makes me think drafting was enabled.

What I don’t understand is why he sat up so rarely, given that he spent the whole ride in a huge bunch and the speed was consistently high.

I agree. I did some of this PAS ride, and was in a pack most of the time, but getting my avatar to sit up seemed really sensitive, as by appearances I should have been in a draft a lot more than my avatar indicated.

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It was not banded, confirmed by the leader during the ride.