<https://forum.bikehub.co.za/topic/1927-powertap/#comment-32475>
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"I agree that it is pointless comparing your numbers to someone else (other than for the fun of it).   There have been tests done which show that the absolute power indicated by sensors under test (PT &amp; SRM) were quite similar - within about 5% of each other. I don't doubt that the ergomo will perform similarly.   As you point out this is not really the issue - as long as your sensor gives you consistent results and does not suffer from any non-linear effects across spectrum of what ... 50w - 1500w.   I've never done a test on a computariner and don't know how the measurements are derived but I definitely have much more difference than you doing the one-legged intervals. I would guess that well-trained athletes have far better figures than untrained cyclists.    My point is that because the ergomo derives it's measurements from the left leg only then any differences between the legs are going to impact on the resultant data. Hence my interest in seeing tests from left and right footed cyclists. I'll qualify that now with \"untrained left &amp; right footed\" because that is where I would expect to see more pronounced differences.   It might be the case that a right footed, untrained cyclist would show a greater improvement using the Ergomo than the same cyclist would have shown on the other two systems. And vice versa for a left footed cyclist.   All a little academic ...         Windbreaker2006-11-01 03:56:17"
<https://forum.bikehub.co.za/topic/1927-powertap/>