Rode mine again yesterday in 3' of bottomless snow by myself. It seemed to go go on the flats, but as far as climbing anything it was useless. I'm going out again today to the same place with a 2016 Cat with a 153 x 3" track. If it gets around in this stuff and is able to climb the little hills I tried and I still can't with this bike, it will be for sale when I get home. Not sure if I'm asking too much of this bike, but I bought it to go where I can't on my sled (I also have a slightly modded 153 x 2.6 track Cat) love the sled works awsome for boondocking. We get lots of dry powder where I live and if thats not what these bike work in, then bikes are not for me.
I guess I better clarify a little. On the super super deep light days, I am definitely poaching sled tracks to get places and make my bike work less hard. No way around it, a 165 850 is definitely going to go up through the snow a little better. But using those tracks to get somewhere and then making my own tracks is where it's at.