Schwalbe Snow Stud tyres seem like a good winter commuting tyre in places that have only occasional snow/ice conditions. When they are fully inflated they can be used on normal roads and when run on low pressure they should provide good enough grip to cycle in icy conditions.
There is a following note on schwalbe website:
In order to ensure that spikes are permanently fixed, tyres should be run in for about 40km on asphalt, while avoiding any fast acceleration or heavy braking.
My question is: Should this tyre be run on normal or low pressure for that initial 40km use on asphalt?