Alfa Romeo 4C Spider (2018 year). Manual — part 54
EXAMPLE:
Service Description:
95
= Load Index
–
A numerical code associated with the maximum load a tire can carry
H
= Speed Symbol
–
A symbol indicating the range of speeds at which a tire can carry a load corresponding to its load index un-
der certain operating conditions
–
The maximum speed corresponding to the speed symbol should only be achieved under specified operating
conditions (i.e., tire pressure, vehicle loading, road conditions, and posted speed limits)
Load Identification:
Absence of the following load identification symbols on the sidewall of the tire indicates a Standard Load (SL)
tire:
•
XL
= Extra load (or reinforced) tire, or
•
LL
= Light load tire or
•
C, D, E, F, G
= Load range associated with the maximum load a tire can carry at a specified pressure
Maximum Load
– Maximum load indicates the maximum load this tire is designed to carry
Maximum Pressure
– Maximum pressure indicates the maximum permissible cold tire inflation pressure for this
tire
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SERVICING AND MAINTENANCE
Tire Identification Number (TIN)
The TIN may be found on one or both sides of the tire;
however, the date code may only be on one side. Tires
with white sidewalls will have the full TIN, including
the date code, located on the white sidewall side of the
tire. Look for the TIN on the outboard side of black
sidewall tires as mounted on the vehicle. If the TIN is
not found on the outboard side, then you will find it on
the inboard side of the tire.
EXAMPLE:
DOT MA L9 ABCD 0301
DOT
= Department of Transportation
–
This symbol certifies that the tire is in compliance with the U.S. Department of Transportation tire safety
standards and is approved for highway use
MA
= Code representing the tire manufacturing location (two digits)
L9
= Code representing the tire size (two digits)
ABCD
= Code used by the tire manufacturer (one to four digits)
03
= Number representing the week in which the tire was manufactured (two digits)
–
03 means the 3rd week
01
= Number representing the year in which the tire was manufactured (two digits)
–
01 means the year 2001
–
Prior to July 2000, tire manufacturers were only required to have one number to represent the year in which
the tire was manufactured. Example: 031 could represent the 3rd week of 1981 or 1991
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SERVICING AND MAINTENANCE
233
Tire Terminology And Definitions
Term
Definition
B-Pillar
The vehicle B-Pillar is the structural member of the body located
behind the front door.
Cold Tire Inflation Pressure
Cold tire inflation pressure is defined as the tire pressure after
the vehicle has not been driven for at least three hours, or driven
less than 1 mile (1.6 km) after sitting for a minimum of three
hours. Inflation pressure is measured in units of PSI (pounds per
square inch) or kPa (kilopascals).
Maximum Inflation Pressure
The maximum inflation pressure is the maximum permissible
cold tire inflation pressure for this tire. The maximum inflation
pressure is molded into the sidewall.
Recommended Cold Tire Inflation Pres-
sure
Vehicle manufacturer’s recommended cold tire inflation pressure
as shown on the tire placard.
Tire Placard
A label permanently attached to the vehicle describing the vehi-
cle’s loading capacity, the original equipment tire sizes and the
recommended cold tire inflation pressures.
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SERVICING AND MAINTENANCE
Tire Loading And Tire Pressure
NOTE:
The proper cold tire inflation pressure is listed
on the driver’s side B-Pillar or the rear edge of the
driver’s side door.
Check the inflation pressure of each tire, including the
spare tire (if equipped), at least monthly and inflate to
the recommended pressure for your vehicle.
Example Tire Placard Location (Door)
Example Tire Placard Location (B-Pillar)
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SERVICING AND MAINTENANCE
235
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