Uniform tire quality grading
DOT (Department of Transportation) Quality
Grades: All passenger car tires must conform to
federal safety requirements in addition to these
grades.
Quality grades can be found where applicable on
the tire sidewall between tread shoulder and
maximum section width. For example:
Treadwear 200 ...
Front wheel hub and knuckle
Inspection
Check the axle and suspension parts for excessive play, wear, or damage.
Shake each front wheel to check for excessive play as shown.
FRONT WHEEL BEARING INSPECTION
Move wheel hub and bearing assembly in the axial direction by hand. Make
sure the axial end play is withi ...