Snow tires use a combination of a softer
winter rubber compound, tiny slits called sipes to add more contact area and to grab onto snow and ice, as well as a deeper tread to do the job.
This all comes down to a combination of specialized tread blocks, and
a winter rubber compound that keeps its full elasticity in sub-freezing conditions.
Not exact matches
The nitty gritty:
Winter tires combine flexible
rubber compounds with small tread blocks and hundreds of small cuts, or sipes, in tread itself.
Winter tyres, and all season tyres, are constructed with a different type of
rubber compound - containing a higher percentage of silica and natural
rubber.
Because they are made with a different
rubber compound,
winter tires keep their elasticity longer than other tires, and this in turn provides better traction on
winter roads.
Winter tires come with a soft
rubber compound that can stay flexible even when temperatures drop.
The
rubber compounds ranged from a «summer» performance tire (right) to an all - season tire (middle) to the
winter compound used in the Michelin X-Ice (left).
So does the
winter compound of the
rubber, which commonly features silica (otherwise known as sand).
According to Woody, «
Winter tires feature deep, aggressive tread patterns molded in relatively soft
rubber compounds that remains highly pliable even in sub-freezing temperatures.
That's the single most important evolution in
winter tires since about 2001: developing a
rubber compound that offers maximum traction at temperatures well below freezing,» says Michelin's Margadonna.
Finally, the
rubber compound that
winter tires use alone provides a much greater advantage compared to summer or all - season tires.
Tires: Look for a soft -
compound winter tire with aggressive siping — the little slits in the tread blocks that help the
rubber bite through the snow and grip the surface underneath.
The
rubber compounds and other components that make up
winter tires keep them flexible in temperatures below 45 degrees (7 degrees C).
While many drivers believe all - season tires suffice throughout the
winter, the
rubber compound these tires are made of becomes too stiff to effectively navigate at about -10 degrees Celsius.