Department Of Transportation Uniform Tire Quality Grades - Alfa Romeo Giulia 2017 User Manual

Snow Chains
Rear Wheel Drive and All-Wheel
Drive Models
9 mm snow chains can be used on all
tires with a width equal to or less than
225mm (225/50 R17, 225/45 R18,
225/40 R19). 7 mm chains can be fitted
to 255/35 R19 tires.
We recommend using snow chains
available from your authorized dealer.
Note:
The snow chains may be applied
only to the rear wheel tires.
Check the tension of the snow
chains after the first few feet/meters
have been driven.
Using snow chains with tires with
non-original dimensions may damage
the vehicle.
Using different size or type (M+S,
snow, etc.) tires between front and rear
axle may adversely affect vehicle
driveability, with the risk of losing
control of the vehicle and resulting
accidents.
186
Quadrifoglio Models
It is only possible to put chains on the
rear 265/35 R19 tire (winter tire size).
Avoid using traditional chains as they
can damage the braking system if not
installed correctly, thereby
compromising the vehicles safety.
We strongly advise using
zero-clearance chains and to use
equipment proposed by an authorized
dealer.
DEPARTMENT OF
TRANSPORTATION
UNIFORM TIRE
QUALITY GRADES
The following tire grading
categories were established by the
National Highway Traffic Safety
Administration. The specific grade
rating 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 example, a tire graded
150 would wear one and one-half
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