Good for light snow, bare roads, horrible on ice.
These tires roll incredibly well, much much better than my Schwalbe Marathon Winter tires. The Top Contact Winter II work better than my studded tires on bare pavement (obviously), and they do remarkably well on light snow/slush.
On actual ice, these tires do horrible. ZERO noticeable improvement over my summer slicks. My Marathon Winter do much better on ice, but they also have hundreds of carbide-tipped spikes to grab into the ice.
On deep snow these work no better than the Marathon Winters, which work no better than any other tire. Once the snow is deep enough that your tires are only making contact with snow and no longer making contact with the road below, no tire provides any real traction, and anything outside a 'floaty' fatbike tire is going to be very difficult to ride.
These tires do seem to handle cold better than most, staying supple at lower temps than some other tire I ride.
Overall a very good tire, but if you plan on riding on ice frequently, get a set of studded tires instead. If you're like me, and end up having a week or two every winter where everything is iced up, but the rest of the winter it's clear, do what I do get both. I ride these most days and when things get icy, I swap wheelsets to the ones with my studded tires.
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