SUV Winter Silica compound The SUV Winter Silica compound has been designed to operate reliably under varying conditions and at high speeds. This rigid tread compound ensures the excellent grip and wear resistance of the winter tyre under all temperatures. The SUV Winter Silica compound reliably reacts to changes in temperature, and its high silica content optimises the wet grip of the tyre. Rapeseed oil has been added to the rubber compound to improve the eco-friendliness of the tyre. Rapeseed oil maximises the tear strength of the tyre, thereby increasing its durability. It also maximises ice and snow grip under extreme conditions.