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Det var fryktelig mye tull med Flux1

Let’s be clear about this, the Flux S smart/interactive trainer is nothing more than an original 2018 Flux 1 with different legs. But is it really that simple? Not entirely. As a Facebook relationship status might say: It’s complicated.

See, when I use the term ‘2018 Flux 1’, that in itself is confusing. As there’s actually a substantial difference internally between an original ‘2016 Flux 1’, and a new 2018 Flux 1. Even after that clarification it can remain confusing, as a 2018 Flux 1 manufactured in January will vary in comparison to one made in June 2018. I say June, because that’s when most of the changes were incorporated into the product line. And now, finally, the original Flux model will be discontinued, likely as making way for the Flux S. The product you’re actually interested in today.

Like most products, over time the manufacturing line has quietly introduced changes that make usually minor and largely unseen changes. In the case of the Flux 1 which got off to a rocky start two years ago with manufacturing quality issues, there were a slew of changes made early in the cycle. Again, mostly related to QA issues in the manufacturing process to ensure the product was produced as actually designed.

However, this past spring Tacx started implementing a handful of changes into the Flux 1 units that would eventually serve as the basis for not just the Flux S but also the Flux 2 as well (which isn’t set to ship for a bit longer). Specifically, the following mechanical changes were done:

– Improved internal tension roller (which results in slightly improved road feel and accuracy during sprints)
– Improved internal alignment (nothing meaningful to consumers, purely manufacturing)

Like I said, not much in the grand scheme of things you can write on the outside of a new product box. These were applied to the Flux 1 inline over the course of spring.

However, there’s one change that’s coming exclusively to the Flux S:

– Long derailleur cage support (they dropped the legs lower so that it fits)

And that’s it. With that change, you’ve gone from Flux 1 to Flux S.