Winter 4x4 tyre kennzeichnungen ms snowflake symbol tyre width 215 mm tyre cross section 80 rim diameter 15 inch load index 102 up to 850 kg speed rating r up to 106 mph rim protector rolling resistance g wet grip f noise emission 72 db noise classification nc 2 installation all round tyre sipe unidirectional tread customer benefits equal grip distribution main strength high traction