Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

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dan

Fwiw I have Stages, track powertap and p2m. I mostly agree with @Slack here - it may not be 100% accurate but it is a useful training tool.

I once did a side by side test with my track powertap and Stages (when I was still using omniums) during a rollers session. Powertap and Stages were ~10w apart ( which can be attributed to crank vs hub) all the way up to 20min powe. After that Stages crept up to +/-1% for vo2max and topped out at +/-5% for peak power.

Conclusion - it's fine for steady state riding and training - just don't expect it to give you lab-accurate race data or record your peak power accurately - not that any of you tester bedwetters care about that :)

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hippy in reply to @dan

As a track sprinter, 5% for peak power could be a massive difference so you're kind of shooting yourself in the foot here. It once again boils down to 'the particular rider being happy with x error margin at x price point'.

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dan in reply to @hippy

I don't use that bike for max power efforts - it's a winter bike. The shortest effort I will generally do on it is 5 mins... But generally it just get used for loads and loads of z2 or Z3 work.

If I want to measure peak power I will use the p2m on road or Powertap on the track.

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