My winter bikes can run studded tires...I have a mountain bike and a single speed Surly Steamroller. I also have extra wheels with regular tires so on dry days I don't have to deal with studded tire drag. I wax my chains and have an extra so I can swap chains easily, and since waxing chains is tedious, I wax several at a time. Waxed chains don't pickup grit like oiled chains, so chain rings and cogs last longer. I go to cartridge bearing when I can, definitely with headsets and BB, but also hubs if I can. Most of my fleet are steel and I coat the insides with Boeshield and let them dry, which protects against inner rust. Except for square taper BB spindles I use grease or antiseize compound on stems, bolts, seatposts and everything else so rust and/or steel-aluminum corrosion won't make taking things apart difficult. My bikes stay in an unheated shed....don't know if it is true but I've read that taking a warm bike out in the cold can cause condensation on the inside of the frame. Getting frames wet on the outside is no big deal but the grit and salt on rims, chains, cogs and sprockets can trash them very quickly.