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25 Cards in this Set
- Front
- Back
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Rim Width |
The distance between one rim flange to another |
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Rim Flange |
The outside edge |
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Bead Seat |
The part of the rim |
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Tires on most passenger vehicles are called:
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Pneumatic Tires
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Some vehicles, such as forklifts, may use
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solid rubber tires
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Early pneumatic tires were called
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tube-type tires
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why doesn’t the tire expand like a balloon
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It has lots of strong reinforcing strands molded into it, which gives it strength while still allowing it to be flexible. So the air inside the tire pushes outward on the tire, stretching the strands tightly, which prevents the tire from ballooning.
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side force
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is the pressure on the wheel that pushes it toward the outside or inside of the rim as the vehicle makes a turn.
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n |
the contact of the tire with the surface of the road produces enough friction to prevent this force from actually pushing the wheel and tire sideways across the road surface. However, when the roads are icy, the tire is unable to grip the road surface adequately to generate enough friction to overcome the side force, resulting in the wheels and vehicle skidding sideways during a turn. Without the resistance created by friction, side force will cause the vehicle to continue in a straight line.
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Cornering Force |
A force between the tread and the road surface as the vehicle turns
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When a vehicle is being driven into a turn with a decreasing radius
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, both slip angle and cornering force increase, until a point is reached where the tire slides. At this point, the only resistance comes from sliding kinetic friction across the road surface. The tire grips again only when the vehicle has slowed or the wheels are not turned so sharply—that is, when the side force is reduced to a level the tire can withstand without skidding.
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Slip Angle |
The tire’s sideways distortion makes the vehicle follow a path at an angle to the direction the road wheel is pointing.
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n |
Since both front and rear tires develop a slip angle in a turn, the vehicle’s path is determined by the steering of the front tires and the slip angles of both the front and the rear tires. These slip angles depend on the weight distribution within the vehicle, the wheelbase, the tire track, and the overall length of the vehicle. The weight distribution is affected by whether the engine is front, mid, or rear mounted. Another factor is if the vehicle is front- or rear-wheel drive.
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Radial Ply Tires |
the cord plies are arranged at 90 degrees to the direction of travel, or radially (from the center of the tire).
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Define Radial |
na |
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Define plies |
a layer of something such as wood or paper, or a thread that is wrapped with other threads to form yarn (= wool cord) or rope
-Cambridge Dictionary |
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What is the tread of the tire made of |
na |
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Another name for run flat tires |
na |
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Why does the tire have to be the exact fit of the wheel? |
na |
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When does manufacture recommend tires be rotated? |
na |
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Right side and left hand threads |
na |
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The distance from its hub mounting surface to the centerline of the wheel. |
Wheel Offset |
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The plane of the hub mounting surface is even with the centerline of the wheel. Vehicles manufactured in the mid-70s through the 80s were typically built with zero offset wheels. |
Zero Off-set |
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The plane of the hub mounting surface is shifted from the centerline toward the outside or front side of the wheel. Positive offset wheels are generally found on front-wheel drive vehicles and the newer rear-wheel drive vehicles.
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Positive Off-Set |
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The hub mounting surface is toward the brake side or back of the wheel’s centerline. Older model vehicles and specialized high-performance vehicles with deep dish wheels typically have wheels with negative offset.
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Negative Off-Set |
