A pneumatic tire having a tread suitable for a winter tires, having a high grip on snow/ice, the pneumatic tire having the tread comprising at least two radially superposed portions. Such a tread is comprising a surfacic portion intended to come into contact with ground during rolling at least when the tread is new and in the cured state, having a thickness of more than 1 mm and being made of a rubber composition, an internal portion adjacent to the surfacic portion, having a thickness of more than 1 mm and being made of a rubber composition which is different from the rubber composition of the surfacic portion. The rubber composition of the surfacic portion comprises at least a diene elastomer, more than 30 phr of a liquid plasticizer, 50 to 150 phr of a reinforcing filler and milliparticles having a median size by weight of more than 1 mm, and a volume fraction of the milliparticles more than 20% in volume of the rubber composition of the surfacic portion.