Originally Posted by ChrisSlicks

From the owner's manual.

TIRE EQUIPMENT
SUMMER tires have a tread designed to provide
superior performance on dry pavement. However,
the performance of these tires will be
substantially reduced in snowy and icy conditions.
If you operate your vehicle on snowy or icy
roads, NISSAN recommends the use of MUD &
SNOWor ALL SEASON tires on all four wheels.
Consult a NISSAN dealer for the tire type, size,
speed rating and availability information.
For additional traction on icy roads, studded
tires may be used. However, some U.S. states
and Canadian provinces prohibit their use.
Check local, state and provincial laws before
installing studded tires.

Also

The VDC system is not a substitute .
for winter tires or tire chains on a
snow covered road.