Garmin support for Shimano FC-9200P Power

this shimano powermeter has NO AUTOZERO (just see the pros, they are all struggling with manual zeroing because it measuere the power randomly high or low, last time Pidcock had to stop in neutralized start to press manually the zeroing button, this powermeter a big cr@p,  all reviews wrote it alread) . it is not a pedal-based pmeter, only with that you need (and be able to) to change the crank length, with a crank-based pm like this, the crank length is hard-coded into the firmware, You cant modify it. probably the Wahoo has buggy firmware with this powermeter... so nothing wrong with Garmin.

Thanks Luko for the information! You are correct, a lot of people complaining about this power meter. Amazing how a big company like Shimano can not do a good job like other smaller companies.

I worked with Wahoo and they just released a firmware update that is a little better. One thing I am still curious is why when I do a manual calibration with Wahoo I see: "Manual Zero Successful Radial Force 65535 Tangential Force 5050" But when I do a calibration with the Garmin 840, I only see: "Calibration Successful Current Calibration 5050". Do you think the Garmin is not registering vector information? Is one calibration "better" or more "accurate" than the other?

i think the radial force is 65535 for everybody as You have to calibrate it in vertical position. so the most head units are not showing this unnecessary data, only the "tangentinal" number aka calibration offset number. there is no better or worse calibration, the head units (or a phone or a wristwatch) just send a command to the powermeter , it runs the calibration process inside, and send back data package with datas, thats all. if your coffee grinder would be so smart that could send such a command, that could perform a zero offset calibration on the cranks

this is why they put a physical button for the crank for calibration, you dont need a head unit/wristwatch/phone neither to zeroing it

Thanks again man! Very informative and educational. I am curious, what cycle computer do you use? The reason I ask is because I posted a nagging issue with the Edge 840 and maybe you have an idea why that happens.

This is the question: https://forums.garmin.com/sports-fitness/cycling/f/edge-840-series/332947/why-a-second-data-screen-is-created-when-switching-trainer-mode

And actually, that additional data screen shows up regardless of the profile. It shows up the minute the computer detects a paired trainer.

i use a standard 840 (with a FR965). i will read & check your post only tomorrow, for today i am off