Single speed mountain bike! Last year, it was a 6 speed. The year before, an 18 speed. I don't have the energy or facilities to keep a winter bike clean, so this will be better (and single speed chains are cheap to replace).

This will be year 4 for the studs. My fair city only salts the main drags and scrapes the rest. If we get a real winter, it will be a good 4 months of frozen-over snowpack: good fun with studs, not as fun without. I'm considering a pair of lightly studded tires for 700c wheels, allowing me to ride a better/faster bike longer into the year. It will depend on whether we get a real winter that goes straight to permasnow (MTB required) or a warm winter with a freeze-thaw cycle like last year.

Clothing and gear is good to go. I'm currently set up to ride from -20F and up, and if it gets colder than that, the University where I work will shut down because college students don't have appropriate gear and nobody will be able to start their cars.