<https://forum.bikehub.co.za/topic/1927-powertap/#comment-32457>
<http://schema.org/text>
"Ergomo testing is coming along very well.  The first unit I had was not installed correctly and was underreading by about 50 watts.  In the process of taking it off, the mechanic managed to shear the wires right where they enter the unit - so that one has been sent back to Germany.    The second unit has been installed correctly and is correlating well with computrainer and powertap (slight deviation at higher power levels ~350 watts and upwards) and there is a really interesting scientific debate on CyclingForums regarding the impact of this ().  I am working with the engineers in Germany to sort it out.   So far, the feature I like the best about it is real-time display of TSS/IF/NP.  This has really helped me stay in the training zones and accurately hit the training stress that Bikemax gives me.  Other nice features are the altimeter and coded straps.   I have trained/raced with a PowerTap for over a year - it is a very good device and it's accuracy is unquestionable!!  I took the option of buying a second hand PT Pro built into a Mavic Open Pro rim, and having my Zip 404's built in with a PT SL.   In general - my comments would to confirm what Bikemax and windbreaker are saying - every single ride should be down with a power meter if possible.  In term of monitoring training stress, seeing your true outputs etc it needs to be there all the time.  "
<https://forum.bikehub.co.za/topic/1927-powertap/>