For a safer journey. You have full control on icy roads with the Marathon Winter. Even in tight bends and under violent braking everything remains under control. The spikes work best on ice when running at minimum pressure, while at maximum pressure the tires can be ridden on ice-free roads with minimal road noise..
Granted, these things are not cheap. So I figured out how much I was going to spend on riding the Citilink bus every day and figured that I would ride it at least until the middle of March and I am going for it!