Tire Terminology - Aston Martin DB 9 2010 Manual

Highway Hazards
No matter how carefully you drive there's always the possibility that
you may eventually have a flat tire on the highway. Drive slowly to
the closest safe area out of traffic. This may further damage the flat
tire, but your safety is more important.
If you feel a sudden vibration or ride disturbance while driving, or you
suspect your tire or vehicle has been damaged, immediately reduce
your speed. Drive with caution until you can safely pull off the road.
Stop and inspect the tires for damage. If a tire is under-inflated or
damaged, deflate it, remove wheel and replace it with your spare tire
and wheel.
If you can not detect a cause, have the vehicle towed to the nearest
repair facility or tire dealer to have the vehicle inspected.
11.22

Tire Terminology

Tire Label - A label showing the OE (Original Equipment) tire sizes,
recommended inflation pressure and the maximum weight the
vehicle can carry.
Tire Identification Number (TIN) - A number on the sidewall of
each tire providing information about the tire brand and
manufacturing plant, tire size and date of manufacture. Also referred
to as DOT code.
Inflation Pressure - A measure of the amount of air in a tire.
Standard Load - A class of P-metric or Metric tires designed to carry
a maximum load at 35psi (2.4 bar) [37psi (2.5bar) for Metric tires].
Increasing the inflation pressure beyond this pressure will not
increase the tire's load carrying capability.
Extra Load - A class of P-metric or Metric tires designed to carry a
heavier maximum load at 41psi (2.8 bar) [43psi (2.9 bar) for Metric
tires]. Increasing the inflation pressure beyond this pressure will not
increase the tire's load carrying capability.
kPa - Kilo pascal, a metric unit of air pressure.
PSI - Pounds per square inch, a standard unit of air pressure.
Cold Inflation Pressure - The tire pressure when the vehicle has
been stationary and out of direct sun light for an hour or more and
prior to the vehicle being driven for 1 mile (1.6km).
Recommended Inflation Pressure - The cold inflation pressure
found on the Safety Compliance Certification Label or Tire Label
(found on the edge of the driver's door).