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H-Rated |
A
speed rating category for tires which is used on vehicles
with a top speed up to 130 mph.
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High Flotation Sizing System
for Light Trucks |
A
system using overall diameter in inches, section width in
inches, type of tire construction, and rim diameter in
inches (e.g.: 33x12.50R15LT).
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High Pressure Die Cast
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A
wheel manufacturing process using aluminum, alloys in
special high pressure die casting machines.
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Hub Centric |
A
situation where the center bore hole of a wheel is made to
match up with the hub diameter of the vehicle; the wheel is
then centered by the center hole, rather than the lug nuts.
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Hydroplaning |
Loss
of traction at high speeds caused by a wedge of water which
lifts a tire off the road surface.
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I |
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Idler Arm |
A
device attached to the frame of the car which duplicated the
movement of the Pitman arm and keeps the center link
aligned.
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Imbalance |
A
non-uniform distribution of mass in a tire and wheel
assembly about its axis of rotation.
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Independent Suspension
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A
suspension system in which the front or rear pair of wheels
of a car are independently connected to the frame or
underbody. In this system, deflection of the wheel on one
side will not affect the wheel on the other side.
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Inertia |
The
tendency of any mass at rest to stay motionless, or any mass
which is moving to remain moving in a straight-line.
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Inner liner |
The
layers of low permeability rubber which are laminated to the
inside of a tubeless tire to insure the air retention
quality of the tire body.
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ISCA |
International Show Car Association. |