tldnr: kickr snap power is rubbish, the spindown is a joke. You can ride with to low power numbers with the spindown, or too high without.
Hey. This is a while ago, but I comment anyway. I ride with an extra training wheel as well. always calibrated my kickr snap every single time as said in the manual (and which is super annoying). With 10 m warmup and making sure spindown time is between 10 and 15 seconds. and had over time risen my ftp from about 180 to 220. I just thought I maybe don’t have the genes for cycling, running being my first sport anyway.
A few weeks ago I invested in a new bike with a powermeter and it turns out, I can do a 15 mins climb averaging 300 watts, and more than one per ride. (Which matches roughly with calculated power on strava, but I thought strava just wants to stroke my ego so I buy premium). While 270 watts is my max 5 min effort on the snap and then I’m done.
New bike has thru axle, and I won’t buy the upgrade kit from wahoo. So I can’t directly compare the power meter with the kickr snap.
They don’t see money from me again, next trainer is a tacx