Tires

Tires

A ring-shaped covering fixed around the wheel-rim of an automobile that both protects it and provides a shock-absorbant cushion to increase vehicle performance and speed.

Industry: Automotive; Rubber

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Tires

Positive offset

Automotive; Tires

The mounting face of a wheel is toward the wheel's street side, moving the tyre and wheel assembly in toward the vehicle.

Ribs

Automotive; Tires

A pattern of tread features aligned around the circumference of a tire. There are usually multiple ribs across the tread area of a tire.

Section width

Automotive; Tires

The distance between the outside of a tire's sidewalls, not including any lettering or designs

Positive caster

Automotive; Tires

Alignment setting when the steering axis is inclined rearward at the top.

Rim flange

Automotive; Tires

Surface of the rim of the wheel that contacts the side of the tyre bead.

Lateral runout

Automotive; Tires

Side-to-side wobbling of a wheel as it rotates; a shimmy.

Negative camber

Automotive; Tires

Alignment setting where the tops of the tyres are leaning toward the centerline of the vehicle; racers use a negative camber angle for maximum cornering potential.