The rubber part of the wheel which contacts the ground. The construction can be bias-ply, bias-belted, or radial. The plies are made of rayon, nylon, and polyester. Belting can be fibreglass, steel, or kevlar. The rest of the tyre is hard rubber.
Cross-section through a tyre and wheel rim.
The ratio of section height to section width multiplied by 100.
Refers to a tyre with the ply cords at an angle, overlaid with reinforcing belts.
Refers to a tyre with the ply cords at an angle to the centre of the tyre; no belts are used.
Used as a filler, to provide a uniform colour, and to increase wear resistance.
Area of a tyre that actually touches the road.
The portion of the tyre between the tread and the bead.
Used as a filler in the tyre rubber to improve life and to reduce rolling resistance.
Narrow slits in the tread blocks that allow the tread block to flex and so increase grip. They also pump water away and so improve wet-weather grip.
Goodyear NASCAR tyres are at an optimum between 90°C and 120°C. If the tyre temperature goes above 135°C they are likely to blister.
That portion of the tyre that bears against the rim flange. The bead has a number of turns of steel wire in it to provide great strength.
An instrument for determining the pressure in a tube or tyre.
See also: Independent Suspension, Rolling Resistance, Run-Flat Tyre, Silicon Dioxide, Slick Tyre, Slip Angle, Space Saver Tyre, Spare Tyre, Tubeless Tyre, Tyre Bead, Tyre Envelope, Tyre Noise, Tyre Pressure, Tyre Pressure Gauge, Tyre Rolling Circumference, Tyre Rolling Radius, Tyre Speed Rating, Tyre Squeal, Tyre Tread Pattern, Wheel, Wheel Balance.
Subjects: Mechanical Engineering