Tyre Information,Technical Terms Explained, Tyre Tips, Tyre Glossary, Tyres, Tyres Melbourne

 
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TYRE GLOSSARY

Air Pressure:
The amount of air inside your tyre. Measured in either pounds per square inch (psi) or bars. The correct pressure for tyres for each vehicle can usually be found in the handbook.

Alignment:
Alignment is a process that ensures the suspension, wheels and steering are all in accordance with the manufacturers specification for the best way the wheels should be pointing.

Aspect Ratio:
A way of expressing a tyre's height as a percentage of its section width. This figure can be found on the sidewall of the tyre.

Balancing:
Tyre balancing is a technical process which ensures that the when the tyre and the wheel spin their weight is equally distributed throughout.

Bar:
Bar is a metric unit for air pressure for your tyres.

Bead:
A ring of steel wire, within a rubber wrap. This helps to hold the tyre to the rim of your car.

Casing:
This is the inside of the tyre sitting underneath the tread and sidewalls.

Cold Inflation Pressure:
Cold Inflation Pressure is the tyre pressure before the tyre has been able to heat up from driving.

Cold weather tyres:
A tyre designed to give better grip below temperatures of 7 degrees

Footprint:
The area of the tyre's tread that comes into contact with the ground.

Innerliner:
The innerliner prevents air from seeping out of the tyre in a tubeless tyre.

Load Index:
This is a code that ranges from 0 to 279. It identifies the maximum weight a tyre can bear at the speed indicated by a speed symbol under certain service conditions.

Low profile tyres:
Low profile tyres are a description of tyres that are quite thin in comparison to the radius of the wheel itself.

Maximum Inflation Pressure:
The maximum pressure that your tyre can be inflated up to.

Pounds per square inch:
The imperial unit for air pressure for your tyres.

Rim:
The metal edge of the wheel on which the bead is seated. This enables the tyre to be supported correctly.

Rolling Resistance:
The energy necessary to keep a tyre moving at a constant speed.

Run-flats:
Run-flat tyres enable vehicles to be driven at reduced speeds for a limited time. After this time they are to be replaced.

Section Height:
Tyre height from the rim to the outer tread.

Section Width:
The measurement of the tyre from one side to the other side.

Shoulder:
The shoulder can be found where the sidewall and tread meet on your tyre.

Sidewall:
The sidewall is the area between the bead and the start of the tread on your tyre.

Sipes:
Sipes are slits in the tread designed to improve the grip of the tyres in wet conditions.

Size:
The size is used to identify a specific tyre. This includes identifying width, construction type, aspect ratio and rim size.

Speed Rating:
Speed rating is used to indicate the variance of speeds at which a tyre can carry a load under a range of different conditions.

Tyre:
Made of a mixture of rubber, chemicals, fabric and metal. A tyre's job is to give the car traction on the road in a variety of conditions and to cushion the car from any possible shock.

Tread:
The tread is the part of the tyre that comes into contact with the road.

Treadwear Indicator:
The Treadwear indicator includes narrow bands in the tread grooves that provide a visual warning to a tyre needs changing.

Tread Width:
The Tread width is the portion or area of the tyres width that is covered by a tread pattern.

Underinflation:
Underinflation is a condition that occurs when there is not sufficient air pressure in a tyre.


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