Continental's winter tires do not lag behind summer tires at all in terms of rolling
 

Contrary to common misconceptions, winter tires have just as little rolling resistance as summer tires. This is due to the material used, their particularly low weight and their tread design. These structural measures reduce the deformation of the tire during motoring, thereby lowering rolling resistance. Therefore, it is a false economy for drivers to put off changing their tires – with the coldest part of the year now quickly drawing in, the braking capacity of winter tires is markedly better than that of summer tires. The fact that fuel consumption is higher in winter than in the summer is attributable solely to the fact that it takes the engine longer to warm up in low temperatures. T... [MORE]