Tire Rotation Recommendations; Department Of Transportation Uniform Tire Quality Grades; Treadwear; Traction Grades - Alfa Romeo 4C spider User Manual

CAUTION!
• Do not drive for prolonged period on dry pave-
ment.
• Observe the traction device manufacturer's in-
structions on the method of installation, operat-
ing speed, and conditions for use.Always use the
suggested operating speed of the device manu-
facturer's if it is less than 30 mph (48 km/h).
• Do not use traction devices on a compact
spare tire.

Tire Rotation Recommendations

Due to tire design and size, tire rotations on this
vehicle are not possible.
NOTE:
For AR 4C models, where available, the vehicle may
be equipped with high performance tires that guar-
antee high grip performance with little increase of
wear. Alfa Romeo, in collaboration with Pirelli, devel-
oped a specific high performance tire for the 4C
model. A dedicated Pirelli PZero, identified with an
AR mark, guarantees this vehicle to obtain the high-
est performance capable.
DEPARTMENT OF
TRANSPORTATION UNIFORM
TIRE QUALITY GRADES
The following tire grading categories were
established by the National Highway Traffic
Safety Administration. The specific grade rat-
ing assigned by the tire's manufacturer in
each category is shown on the sidewall of the
tires on your vehicle.
All passenger vehicle tires must conform to
Federal safety requirements in addition to
these grades.

Treadwear

The Treadwear 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 ex-
ample, a tire graded 150 would wear one
and one-half times as well on the govern-
ment course as a tire graded 100. The rela-
tive 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 prac-
tices, and differences in road characteristics
and climate.

Traction Grades

The Traction grades, from highest to lowest,
are AA, A, B, and C. These grades represent
the tire's ability to stop on wet pavement, as
measured under controlled conditions on
specified government test surfaces of as-
phalt and concrete.A tire marked C may have
poor traction performance.
WARNING!
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration,
cornering, hydroplaning, or peak traction
characteristics.
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