After dropping out of commuting for a few months last year due to icy conditions, this year I'm prepared with a set of Schwalbe Marathon Winter tires. It's probably a bit early for studs here, but the temps are getting to freezing and I had some free time to change the tires this week. Today was my first commute with the Marathon Winters on. Wow, these things have way more rolling resistance than I imagined they would. I lost about 2 MPH on my typical speed. Am I doing something wrong or is this just the way it is? I was under the impression the Marathon Winter had about the lowest rolling resistance among the studded tires, so I can't imagine what the big knobby Nokians must be like!
The tires I've been running for the past year are Continental Travel Contact (26x1.75) which I keep between 50 and 60 psi (Conti recommends 50psi).
The Marathon Winters (also 26x1.75) are rated for 30 to 80 psi and I put 60 psi in them to start out. Should I be running them at much higher pressure?