Winter bike / Snow bike thread

I'm not saying that Dot oil brakes wont work for my use. Just that they might not work as well as simple mechanicals

Cable disc brakes failure mode in cold/snow:

Snow accumulates on caliper
Brake heat melts snow
Water enters between cable and outer, and into caliper mechanism
Water refreezes due to sub zero ambient
Cable is firmly stuck in outer, caliper mechanism blocked by ice, brakes stop working.

I'd go hydraulic, and if you're worried about really low temp go for something using DOT fluid, not Shimano mineral oil.