Winter Tires - Aston Martin DB 9 2010 Manual

Bead Area of the Tire - Area of the tire next to the rim.
Sidewall of the Tire - Area between the bead area and the tread.
Tread Area of the Tire - Area of the perimeter of the tire that
contacts the road when mounted on the vehicle.
Rim - The metal support (wheel) for a tire or a tire and tube assembly
upon which the tire beads are seated.

Winter Tires

The tires installed as original equipment are designed with a rubber
compound, tread pattern and width specially suited for high speeds
in normal road conditions, but they are less suitable during extremes
of low temperatures, snow and ice. The use of winter tires will
considerably improve handling during these conditions.
Only use Aston Martin approved winter tires.
Winter Tires
Warning: Maximum speed with winter tires is 150 mph
(240 km/h).
Winter tires must be used in vehicle sets, that is, installed on all four
wheels. Four special wheel rims and winter tires (Refer to 'Tire Air
Pressures', page 12.6) are required for severe weather driving. Do not
exceed the tire speed rating when using winter tires.
Snow (Chains) Spiders
These are available from your Aston Martin Dealer for temporary use
when driving in heavy snow conditions. Snow spiders should only be
installed to the rear (driven) wheels.
The maximum speed when using snow spiders is
30 mph (48 km/h). Remove the snow spiders immediately the
roads are clear of snow.
Make sure the installation instructions supplied with the snow
spiders are kept in a safe place.
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