Important Notes On; Checking; Inflation Pressure - SMART fortwo coupe Operator's Manual

Tires and wheels
120
The Tire and Loading Information placard
lists the recommended cold tire inflation
pressures : for maximum loaded vehicle
weight. The tire inflation pressures listed
apply to the tires installed as original
equipment.
Important notes on tire inflation
pressure
G
Warning!
If the tire inflation pressure drops
repeatedly, check the tires for punctures
from foreign objects and/or whether air is
leaking from the valves or from around the
rim.
Tire temperature and tire inflation
pressure are also increased while driving,
depending on the driving speed and the
tire load.
Potential problems associated with
underinflated and overinflated tires
Underinflated tires
G
Warning!
Follow recommended tire inflation
pressures.
Do not underinflate tires. Underinflated
tires wear excessively and/or unevenly,
adversely affect handling and fuel
economy, and are more likely to fail from
being overheated.
Underinflated tires can
cause excessive and uneven tire wear
R
adversely affect fuel economy
R
lead to tire failure from being
R
overheated
adversely affect handling
R
characteristics
Overinflated tires
G
Warning!
Follow recommended tire inflation
pressures.
Do not overinflate tires. Overinflated
tires can adversely affect handling and
ride comfort, wear unevenly, increase
stopping distance, and result in sudden
deflation (blowout) because they are more
likely to become punctured or damaged by
road debris, potholes etc.
Overinflated tires can
adversely affect handling
R
characteristics
cause uneven tire wear
R
be more prone to damage from road
R
hazards
adversely affect ride comfort
R
increase stopping distance
R
Checking tire inflation pressure
Safety notes
G
Warning!
Follow recommended tire inflation
pressures.
Do not underinflate tires. Underinflated
tires wear excessively and/or unevenly,
adversely affect handling and fuel
economy, and are more likely to fail from
being overheated.