isport wattage readings are low

[Aaron]

I've had the isport for about 1 month now and am consistently getting low wattage readings. One example - on the flats at 22mph with a minor head wind I'm registering 130 watts. Also, it seems that any time i maintain my speed the wattage drops steadily. Readings seem to be pretty good going uphill maybe a little high. They are very low going downhill. I'm 72inches, 170lbs, ride on the drops, bike and gear weigh about 30lbs (still have winter stuff mainly in NE).

I'm looking for a way to troubleshoot this. Is there a prescribed systematic way to get to the cause of the inaccurate readings?

Thanks,
Aaron

[Velocomp]

Do a new calibration ride, making sure that your iBike is acclimated to outdoor temperature, and that wind offset and Tilt calibrations are performed carefully prior to the cal ride.