Pro riders do huge training volume so the importance of data quality in any single training session isn't really all that important, and they usually don't use a power meter to pace their races anyway. Most of us only have a limited amount of training time, we can't (mostly) can't afford wind tunnel time, and many of us are trying to learn how to pace properly so, perhaps paradoxically, many of us need a different level of data quality from our devices. I have a buddy who, when he was a college student, used to paint houses as a summer job. He said "professional quality" paint is the lowest quality because it takes a professional to make the paint cover in one coat. Instead of painting houses, I used to work in a butcher shop. I've seen knives in peoples' kitchens much much nicer than the knives professional butchers use. I have another friend who worked as a prep cook in a fancy restaurant. The pots and pans in that restaurant were bent and beat-up.Skill and specificity of purpose can make up for a lot of deficiencies in the tools we use.
Maybe. Maybe not.Quote:
You just might have a little more trouble measuring changes in performance.
The main argument for Al frames is cost. Cost is probably the only thing about the bikes that the pro riders do not care about at all.
The only way to know is to measure both left and right power. Or left and total power. Or right and total power.
I still think SRM will probably be better, but I've seen enough user reviews of Stages that it seems to work perfectly well, even for high level athletes.
It might be better to attach a Stages crank arm to an SRM or Quarq.
And then you have to combine two data files, and sychronize the individual data points.
It's probably important to also point out that the recording resolution of the head unit(s) might not be good enough to actually get a right/left power split.
So, the Stages PM may not be best but they work well enough and they pay Sky enough for Sky to use them for the purposes we see Sky using them for.
That said, it still wouldn't be my choice. I'd go with a Powertap wheel, or if I felt flush, with Garmin Vector pedals.
Any studies been done to determine the % difference between stages left leg power correlated to other power meters be it crank based or wheel hub?
Aside from correlation, this would statistically shake out typical difference in left and right leg power output. I have to believe most have a dominant leg and this may change actual power up or down by 5% or so. I am pretty such I am right leg dominant and if the stages is on the left leg this would account for some difference.
The reviews of Stages have been very good. Team Sky would not put anything on their race bikes if it negatively affected performance. I purchased a Stages Ultegra 6700 PM back in Dec. I am not a racer, but a cyclist that likes to use modern technology and tools to improve my performance on the bike. As an IT person, I love the metrics and data available. All the different PM models give you a different power number from each other, does that make them all wrong.
For training purposes, the data must be consistent and reliable. In my several months of Stages use, the data has been very useful. The Stages fit my needs and budget. A good wheelset with a Power Tap G3 starts out of $1500 ad goes up. The test of someone’s happiness with a product is, would you buy it again or something else if doing this over again. I am so impressed with the stages product; I will be buying another one late this summer when I buy a new bike.
It's plots like this that make me think that if you need to do QA analysis, or sprint training, or drag estimation, or if you have been using a different PM for a while for structured training, the Stages probably isn't the right PM for you. However, if all you want to do is ride it's probably okay. I think the Stages can be a good gateway drug before moving on to the hard stuff.
what happens when a power meter user knows EXACTLY how much power they are putting out (if such a thing is possible), but still can't catch the commuter with the flatbar bike in front of them? :lol: