I guess I have at least two winter bikes.
This is Citi Bike's classic bike. Sturmey Archer front brake dynamo hub, Nuvinci (now called Enviolo) continuously variable ratio rear hub with drum brake. Heavy duty everything. Provides an upright riding position. Weighs about 50 lbs. Not pleasant to ride, but it's the right bike for the job. And it feels very confident in slippery slush compared with anything I own. I suspect it helps to have most of the weight on the rear wheel. The brakes are really good and reliable in all weather.
This is the latest model e-bike. It weighs about 80 lbs. It easily goes to 18 mph or so. I haven't tried it yet when the ground is slippery, and I'm not sure if I ever will.
