PowerTap SL Reading & Calibration

Discussion in 'Power Training' started by roadcyclist, Oct 29, 2006.

  1. roadcyclist

    roadcyclist New Member

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    Hello all,



    I just got my PT SL and road it during the weekend. I haven’t really gotten a chance to read about it but from talking with the people that I was riding with and the total E spent on the rides that I did, I suspect that it reads low.

    I tried to ride a flat stretch at 25 mph and it read between 230 and 280W; does that sound accurate to you?



    Does the receiver have to be calibrated?


    Thanks!
     
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  2. Alex Simmons

    Alex Simmons Member

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    Calibration is unlikely to be off (but if you are really worried about it you can do the test described here to check).
    http://midweekclub.ca/powerFAQ.htm

    Zeroing the torque setting would be a good idea every so often as a non-zero setting will result in incorrect power readings (you will read the user manual, won't you?;) )

    For a 25 mph ride on flat roads it might require anywhere from 100 - 600 Watts depending on conditions and your individual set up. 230-280W, assuming no wind and dead flat is quite plausible. Plug some numbers in over here to see what it says:
    http://analyticcycling.com/
     
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