I never prep my bike. Not sure what that is--pumping up tires? Cleaning? Oiling?

I don't generally do those things, and I especially avoid doing them in the winter. But I've got fat tire with studs and I've got a chain guard.

The extra time I take when I bike is to pack my trunk bag with clothes, and check the weather, too. Also, putting on my cold weather gear takes a bit more time. I think I might waste 10 minutes when I bike than when I drive. But it's a labor of love.