Originally Posted by
hybridbkrdr
lol, I know the answer is not obvious. People recommend hydraulic disc brakes, however I read they can freeze at -15°C (5°F). And mechanical disc brakes apparently aren't as good as V-brakes anyway. Since I want to go down from 4 bikes to 2, I would likely use that bike in the winter as well. I wouldn't use my touring bike in the winter though.
In terms of braking power in dry weather, they are about on par; but discs are more consistent in all conditions, regardless of actuation method.
At least you can mount a cable disc system on those bikes. How do you want to mount V brakes? Do the wheels even have brake tracks?