SAFETY LEDGE: Describes the raised area situated around the circumference of the bead seat area of tubeless passenger tires, whose function is to prevent the tire beads from becoming unseated while running with low air pressure
SECTION REPAIR: Describes the reinforcement procedure carried out on a tire casing when damage has extended through its tread or sidewall in which the damaged cord is removed, and a new cord is inserted in the form of a patch.
SELF-CLEANING TREAD: Describes a tyre tread pattern with tapered grooves and ribs designed in such a manner that builds up a resistance to loose material building up in the tracks.
SEPARATION: Describes a situation where the parting of re-tread rubber from the buffed casing occurs- usually caused by excessive heat.
SIDE RING: Describes the demountable metal flange used to fix a tire onto a rim base.
SIDEWALL: Describes the part of a tire that sits between the tread and bead- often painted white in the pre-war years.
SINGLE BEAD: Describes a type of tire with a single wire bundle in the bead.
STEEL BELTED RADIAL TIRE: Describes a type of radial tire implanted with steel belts that provide protection and longevity.
TIRE PAINT: Describes a black paint, compatible with tire bodies, used to enhance the appearance of a tire after re-treading.
TIRE PRESSURE: Describes the recommended pressure for a tire, provided by the manufacturer, and dependent on load, speed and other factors, usually offered in pound-force per square inch (psi).
TIRE ROTATION: Describes the recommended practice of moving the tires on the front wheels to the rear and vice versa from the rear to the front to equalise any wear irregularities in the tires.
TIRE SIDEWALL: Describes the part of the tire between the tread and the bead, sometimes painted white.
TIRE SIZE DESIGNATION: Describes the tyre specification marked on the tire sidewall, classed as follows- Type of car, tire width in millimetres; tire section height to width ratio; type of ply; nominal rim diameter.
TIRE VALVE: Describes a valve mounted on the wheel rim of a tubeless tire and tires with inner tubes mounted on the inner tube that allows air to be added or withdrawn to the tire with an air hose.
TREAD PATTERN: Describes the various tread patterns in car tires that will always differ according to the tire manufacturer.
TREAD RIB: Describes the continuously raised portions of rubber running circumferentially in either a straight or zigzag pattern making up the tread on the tire.
TUBELESS TIRE: Describes a tire with no inner tube in which air is sealed in the tire chamber due to the bead adhering to the tire's rim.
VALVE CORE: Describes a check valve within a tire air valve to check air pressure without air pressure loss.
VALVE EXTENSION: Describes an extension that can be added to a tire valve stem making for greater accessibility.
VERTICAL TIRE CLEARANCE: Describes the distance between the top of the tire tread and the part of the vehicle closest above it, after subtracting the axle stop clearance and anY increase in tread depth.
VULCANISE: Describes a method of processing rubber by chemical means, usually combined with heat, to improve its strength, hardness, elasticity and effect bonding to other rubber compounds.
WEATHER CRACKING: Describes a condition that occurs in tyre sidewalls where exposure to adverse weather will cause cracking of the rubber.
WEATHER RESISTANT: Describes a material's ability to withstand the natural climatic conditions that cause surface deterioration.
WEATHER-STRIP: Describes a type of rubber seal fitted to a vehicle body to prevent water, air, and moisture from getting into the interior.
WINTER TIRE: Describes a tire with an extra deep tread suitable for driving in winter conditions.
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