when I calibrate my quarq dzero with my elemnt bolt I get a 5 digit number. Today it was 64766. When I was using a Garmin it was always around 700. Quarq says the number should never be more than 1000 (pos or neg). Does the 64 represent something else? Thanks.

If you don’t get an answer here, there’s a Goggle Wahoo group, just heads up.

My guess is it is just the leading bits being on to fill in the number. But I'd check with the Google group. There's a lot of good info there and Wahoo does check it and answer questions. Or just ask Wahoo directly.

Yeah. If the DZero is returning the offset as a 16-bit signed integer, then 64766 would be a negative number - something like -769. Maybe the Bolt just isn't bothering to display it properly. I have this same combination by the way, but so far have only seen my DZero return positive values on my Elemnt (I usually get readings of around 230-290)

My DZero developed that problem, as reported by my Garmin. I called their tech support and they had me send it back for a warranty replacement.