• You sure it's not just you tired/powerful legs?

    Don't thinks so - 2x20s are pretty much bang on usually.

    IIRC the calibration value is 7000ish - I gather that's not good.

    I'll be doing the test in the link you posted, once I have a known weight / or once I find my luggage scales.

  • IIRC the calibration value is 7000ish - I gather that's not good.

    If it's an old-style Powertap then the 'calibration' number is actually the serial number. My Bromton's calibration number is always -6029.

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