| Accelerator |
A chemical
which speeds the vulcanization of rubber; used in tire compounds
to reduce curing time.
|
| Activator |
A
rubber compound chemical used to help initiate the
vulcanization process.
|
| Adjustment |
A
prescribed allowance given to a customer toward the
replacement of product pursuant to the warranty.
|
| Aging |
A
reduction of physical and chemical properties of rubber by
oxidation over a period of time.
|
| Air
Pressure |
Force
exerted by air within a tire, expressed in pounds per square
inch or kilopascals.
|
| Alignment |
Angles of the tire and suspension axes relative to each
other and the ground: caster, camber, toe. Also, the
adjustment of components to bring them into a predetermined
position for the most efficient operation of wheel and
vehicle for proper even tire wear.
|
| Alpha-Numeric |
A
load-based tire sizing system containing the load capacity,
type of tire construction, aspect ratio, and the rim
diameter in inches.
|
| Anti-Roll bar |
A
steel torsion bar, linking the left and right side of a
suspension. It comes into play during cornering. As the car
leans in a turn, the anti-roll bar resists this leaning by
transferring more weight to the outside tire. It provides a
means to achieve good handling from stiff roll resistance
while maintaining a comfortable ride through soft springs.
|
| Antioxidant |
A
chemical, which when added to a rubber compound, prevents
surface oxidation; used in tire tread and sidewall compounds
to prevent weather checking and cracking.
|
| Aspect Ratio |
The
dimensional relationship between tire section height and
section width; section height divided by section width.
|
| Autocross |
Type
of auto competition where cars transverse a twisting course
marked by pylons. Sometimes referred to as a Gymkhana.
|
| Axial Play |
The up-and-down movement of a ball joint.
|
| Axle |
A
cross support of a vehicle on which its road wheels turn.
|