The Cooper Discoverer M+S tire is a premium studdable winter tire. It is available in LT and p-metric sizes for domestic and foreign SUVs, trucks and minivans. The dense siping (cuts in the tread blocks), enhances winter performance and provides excellent wet traction in rain, snow and ice conditions, but is still studdable. Studs are suited for those that will use this tire only in the winter, and spend most of the winter season on packed snow and ice. On wet and dry roads, the Discover M+S (un-studded) provides all the grip you will need since the tread rubber is a special winter compound, that stays flexible even at freezing temperatures.