This might be helpful; A shift…
From the latest DC Rainmaker post about SRAMs new group set.
But one of the things I’m ever-so-slowly warming to over time and doing years of power meter accuracy testing, is that I’m less convinced that on the whole power meters are as consistently accurate as people think and hope they are . And that for most people, even with slight shifting leg imbalances, I don’t think it’s as critical an issue. …
I’m coming to the conclusion that there are so many ways for power data to be inaccurate on any given day from any given vendor, that the left-only doubling thing probably is a wash in the end.
A few people took note in the comments, and he added further;
In general, people put far too much trust in their power meters providing day to day accuracy . I’ve got great examples of super reputable units that just disagree on a random day for no reason: Quarq DZero vs Tacx NEO 2 or 2T spiking 3-5% different from any other day. Or a Favero Assioma pedal doing the same. Or a KICKR V5 doing the same. … **the industry is yet to the point where one can assume that a PR day of 5w higher or even 10w higher is a legit PR.
I’m not saying single-sided is the answer for everyone, but I am saying that the vast majority of people who say single-sided is useless, would probably be surprised to find out how quietly inaccurate their power meters and trainers are day to day over months/years.
Grain of salt and all that…good luck with your training!