Tyre grades
All passenger car tires must conform to Federal Safety requirements, in addition to these grades.
DOT rating
Pirelli P Zero
220 (Front) – 160
(Rear)
AA
A
Tread wear
Traction
Temperature
Tread wear
The tread wear grade is a comparative rating based on the wear rate of the tire when tested under controlled
conditions on a specified government test course.
For example, a tire graded 150 would wear one and one-half (1 1/2) times as well on the government course
as a tire graded 100.
The relative performance of tires depends upon the actual conditions of their use, however, and may depart
significantly from the norm due to variations in driving habits, service practices and differences in road
characteristics and climate.
Traction
The traction grades, from highest to lowest, are
“AA”,
“
A”,
“
B” and “C”
. Those grades represent the
tyre's ability to stop on wet pavement as measured under controlled conditions on specified government
test surfaces of asphalt and concrete. A tire marked
"C"
has poor traction performance.
The traction rating given to a tyre is based on straight line braking tests and does not take other
factors such as acceleration, steering angle, aquaplaning or traction peaks into account.
Temperature
The temperature grades are
"A"
(the highest),
"B"
, and
"C"
, representing the tyre's resistance to the
generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified
indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire failure. Grade
"C"
corresponds to
a minimum level of resistance to which all tyres for cars carrying passengers must comply, according to
what is established by the Federal Standard no. 109 on vehicle safety (Federal Motor Safety Standard).
Grades
“B”
and
“A”
, measured for tyres on a laboratory test wheel, indicate higher performance levels
than those required by law.
The temperature rating is with reference to a correctly inflated, correctly loaded tyre. Excessive speed,
insufficient inflation, overloading or combinations thereof may cause heat production and possible
tyre failure.
Preparation for tyre removal
Summary of Contents for California
Page 19: ...Z Tyre type and pressure label ...
Page 20: ...04 02 Assembly number Assembly number A Assembly number label ...
Page 21: ...04 03 Chassis number Chassis number B Punched chassis number ...
Page 22: ...04 04 Engine type and number Engine type and number C Punched engine type and number ...
Page 23: ...04 05 Chassis number Chassis number D Chassis number ...
Page 24: ...04 06 Gearbox type and number Gearbox type and number E Gearbox type and number plate ...
Page 25: ...04 07 Vehicle identification Vehicle identification K VIN label Vehicle Identification Number ...
Page 28: ...04 10 Fuel Fuel I Fuel label ...
Page 29: ...04 11 Paintwork Paintwork L Paintwork label ...
Page 30: ...04 12 Emissions control Emissions control M Emissions control data label ...
Page 31: ...04 13 Airbag Airbag N Do not install child seat on passenger seat label ...
Page 32: ...04 14 Airbag Airbag O Airbag maintenance label ...
Page 33: ...04 15 Airbag Airbag P Airbag warning label ...
Page 43: ...Fluids and lubricants table Model Fluids and lubricants table Download ...
Page 71: ...Screw the cap A back on tightly ...
Page 104: ...Connect the battery F2 01 ...
Page 118: ...Vehicle Setup Parameter Check Form Model Vehicle Setup Parameter Check Form Download ...
Page 520: ...A DCT gearbox clutch oil tank and clutch oil pump B Clutch oil pipes C Clutch oil radiator ...
Page 623: ...CCM Brake Disc Wear Form Model All Models CCM Brake Disc Wear Form Download ...
Page 1070: ...A Horn button B Engine start button C Manettino ...
Page 1102: ...Perform the respective cycle with the DEIS diagnostic tester ...
Page 1144: ...Connect the battery F2 01 ...
Page 1220: ...Precautions and guidelines for using the RHT retractable hard top ...
Page 1334: ...Undo the indicated fasteners Retrieve the indicated shims Release the clip 1 ...
Page 1335: ...Remove the indicated clip Undo the indicated screw Undo the screws indicated ...
Page 1452: ...Refit the rear wheelhouses E3 05 Connect the battery F2 01 ...
Page 1453: ...F2 07 Lights Diagnosing condensation in headlamps ...
Page 1561: ...Ss Sensor signal λ Lambda ratio excess g Rich mixture M Lean mixture ...
Page 1570: ...Refit the DCT gearbox C2 03 Connect the battery F2 01 ...
Page 1656: ...G Heater evaporator H Pollen filter I Air vents M Expansion valve ...
Page 1677: ...Refit the front wheelhouses E3 05 ...
Page 1686: ...Refit the caps 1 Refit the engine compartment cosmetic shields E3 13 ...