I’m on the waitlist for the uno. From what I read these are the easiest for multiple bikes

Single sided power meters assume that you always have the exact same left-right balance, regardless of fatigue and intensity. This isn't really a great assumption, it can change, and then when it does, the power inaccuracy is double the change in % balance because it doubles the power measured, which quickly can make it useless

ive heard that dual sided is better but can you expand more as to the why?

My n=1 experience with the Uno is that it extremely accurate.

I do a regular weekly 1hr ride route, weekly 2 hr ride route, and a weekly commute route, and the overall ride AP & NP power is often identical on similar efforts down to the watt. For sure, not even a single ride where I've been 'that's weird - 10 watts higher/lower?' If I +10 AP/NP, I've put up a much more significant effort so I expect it. Same with all the climbs/strava KOM routes.

I suspect the duo would be more accurate for short burst intervals, but for the long typical triathlete rides or longer intervals, the uno seems rock solid.

I was going to upgrade to the duo if needed, but seriously, I have absolutely zero reason to do so. There is no way I'm seeing variances in the range of those folks who theoretically claim it's off for longer intervals or overall ride data.

And it literally doesn't matter that I don't know!

Yeah, sure. For me for example my left/right power is not 50%/50%. Sometimes it's 45/55. When doing intervals with let's say 300W, power could be off by 15W in this case. That's quite a lot. Especially considering power distribution is not always the same. Sometimes I do have 50/50 or 52/48. In this case I'd wonder why my intervals feel harder or easier today and I'd be right because I could be 20W higher or lower than last time. And since you don't know distribution with a single sided pedal you will left wondering if you're having a good/bad day or your distribution was just different today.

Especially Assioma are a great offer, sometimes there's even a discount. I'd get the duo, no question

Not even once have i had a day where I looked at long interval power or overall power (AP or NP) and thought - wow that's weird - 5 watts higher/lower for the same effort (or more). It's literally that precise for me - down to the friggin watt (annoyingly, sometimes - wish it would go up faster!)

The days on my long ride where I get a rabbit to chase and end up riding race pace for a long stretch, yup, that shows up in the average, like +5 or even +7 to the overall power results. And when I'm feeling tired due to training load, yep, that shows up.

Bottom line, at least for me the unos don't reflect any of the wackiness that people keep throwing up on this forum, like intervals suddenly coming in +10 watts or lower.

20watt differential unexpected results is so out reality for me that it's a joke - I would have a hard time even believing a 5 watt errant differential based on my intervals at FTP where I can absolutely feel that 5 watts difference, and for sure, there's no variance bigger than that even with a uno.

I would 100% recommend getting the uno as a triathlete and being 100% fine with it resultwise - the uno itself is more precise and accurate (as assessed from my FTP+ interval work efforts) than any other measuring device I have for tri - GPS, Scosche HRM, Wahoo Kickr PM - so I'd recommend it without hesitation. This is from real-world use as a triathlete (not crit racer.)

I do have some money to burn, and when they are back in stock, I'm actually not planning to upgrade to the duo, but to get a second uno for my other bike (I currently swap).

No difference between Duo and Uno for multiple bikes. You still have to swap both pedals. Tbh, I'd always go for both sided

I was referring to these being easier to switch than other power meter pedals.

Question through, you still have to switch the right pedal on the uno? Why, I thought the left one was only active? I was going to have the same right pedal on both bikes.

I don't have the uno but I'd assume you still get two pedals. One has a powermeter and the other doesn't but same look, same weight, same feel and so on. So in order to ride with the same pedal left and right you'd have to swap both

I was referring to these being easier to switch than other power meter pedals.

Question through, you still have to switch the right pedal on the uno? Why, I thought the left one was only active? I was going to have the same right pedal on both bikes.

The uno comes with one power pedal and one 'normal' pedal just for symmetry.

I am seriously considering just buying a 2nd 'normal' pedal so I can just swap one (instead of both) Uno pedals between my 2 bikes, but honestly, I have enough money now that I can just wait to get a 2nd uno.

Thanks above to the poster validating between actual real-world use of single vs duo. It proves what I've been saying all along for quite a few posts in the past - with lots of 'theoretical' disagreement including some pretty crazy 'what-if' scenarios, but from actual-real world use, those bizarro scenarios absolutely don't come into play.