Originally Posted by
VT Biker
Through some further research, and being naive, I did not zero-offset the device. Not sure the impact on my Quarq's readings, but I will do it tomorrow for the crit I am racing in, and see if the power numbers are closer to the indoor trainer.
My Quarq offset is generally in the range of -600. It doesn't really matter what it is so long as it is consistent and you zero it manually before a ride (and, if you are experiencing drift in the number, reset it by pedalling backwards during the ride). But, with my unit needing a -600, if I had
never zeroed it, my power would be overstated by 180+ watts.