I just got a Tacx Flux 2 and am starting to use Zwift. When I pair, if I pick ‘speed sensor’ it wants me to enter the tyre size, which I’m guessing would be the size of the tire that would be on my bike if it wasn’t on a smart trainer. But I can only pair the Flux under ‘power meter’ and it also pai…

How is Zwift calculating speed

Paul_Allen (Paul) January 17, 2021, 2:58pm 2

Pair your trainer as power and read this: How Does Zwift Determine My Speed?

Topic		Replies	Views
How does Zwift know how fast i'm going Archived: Tips and Troubleshooting	9	2325	November 3, 2017
Zwift speed unrealistically fast Bugs and Support	8	4202	December 17, 2020
Newbie questions on Speed and Power measurement Archived: General Discussion	5	839	February 10, 2018
Zwift Inaccurate Speed Archived: Tips and Troubleshooting	10	11781	August 3, 2017
What affects Avatar speed in Zwift? General Discussion	5	1974	February 3, 2020