# Closest to elderly Tacx Satori Blue

**URL:** <https://forums.zwift.com/t/closest-to-elderly-tacx-satori-blue/522872>\
**Category:** General Discussion\
**Created:** [December 23, 2020, 3:49pm UTC](https://forums.zwift.com/t/closest-to-elderly-tacx-satori-blue/522872 "2020-12-23T15:49:42Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Mike\_Rowe1](https://sea2.discourse-cdn.com/gozwift/user_avatar/forums.zwift.com/mike_rowe1/32/530428_2.png) [@Mike\_Rowe1](https://forums.zwift.com/u/Mike_Rowe1)\
**Post date:** [December 23, 2020, 4:01pm UTC](https://forums.zwift.com/t/closest-to-elderly-tacx-satori-blue/522872/2 "2020-12-23T16:01:56Z")

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> [@Fiona\_Wallace](#):
>
> just a stop-gap until my Kickr Snap arrives

Doesn’t matter too much then, the difference will be the power curve that Zwift assigns to the trainer models. They may be both wildly inaccurate?

For more info on power curves see this post.

> [@How Does Zwift Determine My Speed?](https://forums.zwift.com/t/how-does-zwift-determine-my-speed/427729):
>
> How Does Zwift Determine My Speed? For Wheel-on Classic Trainers: Zwift takes the wheel speed broadcast by your speed sensor and the power curve (see example below) of the trainer you select on the Pairing Screen and converts that to virtual watts, also known as “zPower”. Your in-game speed is de…

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