Glossary “wheel tramp” Definition:
The wheel lifting action or hopping motion caused by static unbalance. Motion may be up-and-down or forward-and-backward, caused by centrifugal force acting on a heavy tire section located near the thread face center.

Glossary “wheel tubs” Definition:
Wheel wells installed to accommodate oversized tires.

Glossary “wheel weights” Definition:
Weights used during the balancing process to equalize the weight mass around and across the tire; attached to the rim with clips or special adhesive.

Glossary “wheel slip sensor” Definition:
Device used in combination with the wheel slip brake control system to send the rate of angular rotation of the wheel(s) and transmit signals to the logic controller.

Glossary “wheel speed sensor” Definition:
Sensor on each wheel used to monitor speed for anti-lock braking systems.

Glossary “wheel speed sensors” Definition:
Electromagnetic devices used to provide wheel speed information for an anti-lock brake system.

Glossary “wheel spindle” Definition:
The spindle on which a wheel is mounted.

Glossary “wheel slip brake control system” Definition:
A system which automatically controls rotational wheel slip during braking.

Glossary “wheel shimmy” Definition:
1). The wobbling motion during rotation of a dynamically unbalanced tire. 2). Rapid inward and outward oscillations of the front wheels.

Glossary “wheel run-out check” Definition:
A test that will show if there is damage to a rotating part of a wheel assembly

Glossary “wheel offset” Definition:
Distance between the centerline of the rim and the mounting plate of the wheel.

Glossary “wheel rebound” Definition:
Downward wheel and suspension movement.

Glossary “wheel rim” Definition:
Circular steel, aluminum, or magnesium components on which the tires are mounted, manufactured from stamped, or pressed steel discs that are riveted or welded together to form the circular rim.

Glossary “wheel puller” Definition:
Device used to remove steering wheels, engine pulleys, and similar pressed-on parts.

Glossary “wheel cylinder kit” Definition:
Parts kit for rebuilding a wheel cylinder.

Glossary “wheel cylinder piston” Definition:
Component in a wheel cylinder on to which hydraulic pressure is applied, that transfer force, causing the brake shoe to contact the drum.

Glossary “wheel hub” Definition:
Compoent that serves as a mounting plate for the wheel or brake rotor or drum. The wheel hub fits over the bearings on a wheel spindle or axle.

Glossary “wheel nut” Definition:
Threaded nuts used to retain the wheel to the studs on the hub assembly.

Glossary “wheel cylinder” Definition:
Hydraulic cylinder mounted on the backing plate of a drum brake assembly. The wheel cylinder convert hydraulic pressure from the master cylinder to mechanical force that applies the brake shoes against the brake drums.

Glossary “wheel centerline” Definition:
An imaginary line through the center of the tire, a vertical line if the tire is exactly in an upright position.