Thread: Flying 200s
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Old 12-31-19, 05:01 AM
  #131  
Morelock
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Originally Posted by Super D View Post
Please elaborate, are they problematic? I had stages on my last few road bikes, and a Pioneer on my TT bike, didn't see much difference in terms of accuracy or reliability.
So, I won't cover a full range of issues with stages reliability in data (i think the internet has done a sufficient job over the years) but something a bit more focused to track and sprinting.

In general the problems with track sprinting and power data (and the reason wired SRM's are still used) is "wakeup" and lag. Wakeup applies to your standing starts... the time from when you start applying force to when the power meter actually "wakes up" and decides to start recording. This is very important for timed events but for a sprinter in particular actually not "all" that important outside of a team sprint. Lag on the other hand is very problematic. Say you're winding up for a flying 200... applying constant(ly increasing) power for your wind up laps, which is something the Stages does handle fairly well... then as you start your sprint "proper" you suddenly go to 2-3x (+) the watts as you dive. The power meter takes some amount of time to figure out "oh hey, something different" and in those moments you're going to find the difference between a stages and a more "powerful" power meter.

In very short, violent efforts you need consistent, reliable data, perhaps even moreso than other forms of cycling. Stages do a passably good job for "most" cycling/cyclists... that is, averaging long stretches of relatively consistent power output. (most forms of cycling) The cracks show up in things like track sprinting, bmx, mountain biking where power shifts quickly and violently and often the spikes are so short that the average it spits out is flawed heavily by a misreading.

Somewhere in one of the threads on here (maybe the power meters for track thread) there is a stages rep who responds to some questions a few years back. He point blank says it's not really made for sprinters.
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