Fwiw, some of us believed the entire reason why the 10t cog was even introduced was not to actually use it, but to push the 11 one more to the left. I am sure I talked about this at least 3-4 years back. 1x is dead simple, there is no thinking, there is up or down. Don't underestimate the amount of brain energy that goes into shifting when you are red-lining in 9 hour race. Fwiw as well, anecdotally n1, I have had 75% fewer chain drops with 1x vs 2x.

But like Alex the takeaways are all wrong for many cyclists. Sure they apply to some cyclists, but the cyclists they apply to are also least likely to even read and pay attention to this IMHO. Take my own setup. What they are saying is that my 54t-11t has no friction difference whether it is 1x or 2x. For many years I have used this setup in 1x or 2x setup but they essentially have the same friction. So no, it isn't 3 watts in that case and factoring in aero, weight, ease of use, price, system complexity greatly favors 1x.

Now if I was doing an uphill stage TT and was in my 54-32T vs say 39-23T maybe, but what percentage of triathlon courses am I ever using a 32T. I used an 54T-25T at Ironman Arizona and I think I was in the 25 for about 4.5 minutes of the race and that is a way off from the 48t in their system

Regardless the graph they have is useless. They need to link to the proper image and not just a quasi thumbnail. Also I am confused by the following line " Smith’s previous research also indicates that the clutch in the SRAM 1X rear derailleur adds no friction."

The rest of the article seems to indicate that increased chain tension adds friction, does the Sram 1x clutch not add any chain tension?

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