Wheel alignments, nitrogen tyre inflation, tyre rotations and balancing are all vital to the life of your tyres.
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Bridgestone Australia Ltd. takes pride in offering professional services and advice to assist you with choosing the right tyres for your vehicle.
It is very important for you to know how to maintain the tyres you purchase to ensure the effectiveness and safety of those tyres.
How to maximise the life of your tyres and stay safer on the road.
Most new tyres start out with about 8-9mm of tread. When the tread wears, the tyre’s ability to disperse water reduces. Regularly check the indicators on your tyre’s tread pattern, which will show as lines across the tread when it’s reduced to 1.6mm.
Under or over-inflation is dangerous and can lead to excessive tread wear. Look for the manufacturer’s recommended tyre pressure, listed on the sticker usually located on the driver’s side door pillar or fuel flap, or have a tyre specialist inflate it for you.Check your tyres weekly, either yourself or use a tyre specialist.
Check your tyre pressure using an accurate tyre gauge and when your tyres are cold. For heavy loads or sustained high-speed operations, increase the inflation pressures according to your vehicle’s recommendations.
There is no set rule for at what the age tyres should be replaced. However, some car makers advise against using tyres over six years old. Over time heat, sunlight and ozone can affect the tyre compound. To check the age of your tyres, look at the Tyre Identification Number (TIN). The last four digits indicate the week and year the tyre was made, for example a tyre with TIN XXX4804 was manufactured in the 48th week of 2004. If in doubt, check with a tyre specialist at your nearest Bridgestone Select.
Tread depth indicators
For maximum tyre life, you should rotate your tyres every 5,000 – 8,000 km, or according to the vehicle manufacturer’s recommendations. Tyres can wear differently depending on their position on the vehicle due to vehicle loading or suspension and steering set up. Rotating your tyres will give a more even, safer wear pattern and prolong tyre life.Get a professional wheel alignment regularly.
Have a professional wheel alignment every six months or 10,000 km, whichever comes first. Misaligned wheels will cause your tyres to wear excessively and irregularly. Having correctly aligned wheels is also essential for safe handling and braking; it can even help to reduce driver fatigue.
The tread on your tyres is what maintains your driving control, grips the road, disperses water and keeps you safe.
A worn tyre increases the the time it takes you to brake in the wet, as well as your chance of losing control.
Understanding tyre size made easy with these pointers from the tyre experts.
195 indicates the section width of a tyre in millimetres.
65 is a tyre’s aspect ratio which is its height from the base of the tread to the rim. This number represents a percentage of the tread width. For example, the height of this tyre is 65% of its width. Low profile tyres have smaller aspect ratio percentages.
R means that the tyre has radial ply construction, meaning the way in which it has been constructed. Most passenger tyres are constructed this way so you will rarely find a car tyre without an R.
15 indicates the diameter of the wheel rim. So if you are buying wheels for existing tyres, this is the size in inches you will require.
Load & Speed
91 V is a symbol that indicates the maximum load capacity and speed at which a tyre can be safely operated, subject to the tyre being in sound condition, correctly fitted and with the recommended inflation pressure.
Overall Diameter of the unloaded tyre in mm
LWT Line White Tubeless
OWT Outline White Letters Tubeless
RBT Raised Black Letters Tubeless
RFT Run Flat Technology
RWT Raised White Letters Tubeless
Bridgestone Run Flat Tyres
Run Flat tyres (RFT) represent the latest in a long line of safety initiatives being made available today. Safety has become something of a catch cry for a society which has become less accepting of the trauma associated with all manner of accidents.
The value of developing and adopting new technologies to keep us safe is well recognised. Furthermore, consumers have demonstrated a willingness to pay a premium for safety features they understand. Just as anti-lock brake systems, traction control, stability control and air bags have trickled down from upper models to base models, the very same is expected of RFT
All you need to know about tyres and more.
Alignment basically means that all four tyres are consistent with each other and are positioned to optimise contact with the road. It consists of three elements – caster, camber and toe.
The pressure of the air inside a tyre. Tyre pressure is measured in psi (see psi).
Aspect ratio is section height divided by section width and multiplied by 100. The higher the figure, the higher the tyre’s section height, the smoother the ride. The lower the figure, the greater a tyre’s section width and the safer the tyre – best for high speed cars.
Balancing a wheel (or tyre) ensures that the weight is evenly distributed. This prevents vibration and uneven tyre wear.
Camber is the angle that the tyre tilts – 0 degrees means the tyre is perfectly perpendicular to the road. If it tilts in at the top towards the vehicle, the camber is negative. Positive camber is when the tyre tilts away from the vehicle at the top.
The casing of a tyre is the outside part of a pneumatic tyre (i.e. not the inner tube).
Cold Inflation Pressure
The pressure of a tyre before the vehicle is driven and the tyre is warmed up.
An innerliner is a lining inside a tyre that prevents air leaking.
The maximum weight a tyre can safely carry.
Tyre markings are the symbols on a tyre’s sidewall to indicate (for example) load index.
PSI is ‘pounds per square inch’ and is a standard measurement of pressure. Basically, it’s the amount of force exerted over one square inch. Normal tyre pressure is 32 psi.
Rim and wheel are often used interchangeably – it is the part that the tyre sits on.
The force required to maintain forward momentum in a straight line at a constant speed.
Run Flat Technology tyres
Run Flat Technology tyres are designed to withstand punctures, thereby allowing the driver to continue to drive even when the tyre is completely deflated. The safety benefits are that it avoids the need for drivers to stop by the side of the road to change tyres and giving drivers ample time to make it home or to the nearest tyre replacement centre, provided they drive within the accepted speed limit and safe distance.
The part of a tyre between the edge of the wheel and tread.
Small slots in a tyre’s tread.
The maximum speed a tyre can travel, corresponding to its load index.
The rubber part that sits on the wheel.
Tyre size is actually a set of numbers and letters that define a tyre’s specifications, such as section width (from sidewall to sidewall), aspect ratio, speed rating and diameter of the wheel the tyre is made to fit on.
The raised part of the rubber on a tyre.
Features built into a tyre to let the driver know that the tyre is worn sufficiently to necessitate changing.
When a tyre is not inflated enough – it can result in a shorter lifespan and reduce fuel economy. Steering and cornering will be negatively affected and rolling resistance will be increased.
Winter tyres are specifically designed to be used on winter roads – ice, snow and water.