In North America winter tires are often referred to as snow tires. Winter tire is a bit wider definition. Winter tires will work on any surface during winter; on ice, snow or slush. They have been designed to work with these conditions in mind.
The tread has been designed for this purpose to ensure that you have maximal control over your vehicle. The grooves are designed to be able to push snow and slush to the side. The tread can include studs and the tires are then referred to as studded tires. If they don’t have studs, they are called non-studded tires or studless tires. Both types work well on any winter surface.
For more information regarding winter tires, visit: www.nokiantires.com