Phew, first week with the studded tires, and a headwind to start on Monday, but I can see improvement today, four days and 100 miles later, that I'm starting to adjust to the extra drag of the studded tires, and for sure I needed them this week with thin coatings of ice and light snow on Monday and Tuesday. It was really funny at red lights . . . the bike was locked to the road if I kept the brakes on, but when putting my feet down they slid all over. +1 for studded tires.