What you need to know about your car tyres!

With the country faced with an influx of imported vehicles, it is now becoming increasing difficult for consumers to differentiate genuine tyres for their cars. Recently, Bridgestone Tyre Company in South Africa warned consumers to be on the lookout for potentially defective tyres that are being imported and sold off cheaply in South Africa.

A number of local tyre dealers, especially those that specialise in selling second hand tyres, provide consumers with tyres bought from South Africa. Most companies will have both branded and generic tyres (tyres made by the big manufacturers under a different brand name). Generic tyres are generally cheaper but may not give the same level of performance. However, as required by law, all tyres, new or old should always meet minimum safety standards.

In South Africa, there has been a public confusion over tyres imported from China and sold at very low prices in South Africa. These tyres may be causing problems in SA but that will surely not be the case locally, as we boast imported cars unlike in SA. Most of these imported tyres are made for specific weather conditions, for instance snow. With the country’s weather condition rarely producing snow, there is no need to buy tyres that suit snow-covered roads.    

Why is tyre pressure important?

There are three primary reasons why maintaining correct car tyre pressure is important. The first reason is road safety; tyres that are under-inflated can overheat and lead to premature failure. Tyres that are over-inflated can lead to rapid uneven tread wear and poor vehicle handling on the road.

The second reason is cost. Incorrectly inflated tyres suffer more from the knocks and bumps a car tyre is subjected to under daily use. A correctly inflated tyre copes better with the day-to-day impacts like kerbing, hitting a pot hole or other objects in the road. Also, incorrectly inflated tyres take more power to maintain the same vehicle speed as correctly inflated tyres do, which means you would save fuel on a journey when the car tyres have been correctly inflated to optimum pressures.

The third reason for maintaining correct car tyre pressure is longevity; checking and correcting your tyre pressures regularly will help you to get the maximum mileage from your car tyres. Correct car tyre pressure helps you to avoid the premature and uneven wear, associated with incorrect car tyre pressure, increasing the tyre’s legal life and that’s not only good for you but has got to be good for the environment.

Tip! Check your car tyre pressures regularly, you can find the recommended car tyre pressure in your vehicle handbook, it’s also worth checking your fuel filler flap or inside the front right hand door-strip for the tyre pressure setting information. Also, carrying extra weight in your vehicle generally requires a higher car tyre pressure setting, so look out for the ‘loaded’ pressure settings if you are using your vehicle to carry extra weight.
Finally, remember to check your car tyre pressure settings when the tyres are cold, the same as the outside ambient temperature, and not after a long journey. Friction between the road and tyre increases the temperature of the tyre and the air inside, leading to ‘air expansion’ inside the tyre, which may result in a false pressure reading. Manufacturers recommend that you check all the car tyre pressures every two-four weeks and that check should include the ‘spare’ tyre too.
 
Why is wheel alignment important?

Incorrect wheel alignment or tracking as it is often referred too, can result in rapid uneven tyre wear and can affect the handling and safety of your vehicle.
The vehicle manufacturers set the wheel alignment at the factory in order to provide a smooth comfortable ride for your vehicle and to get the maximum life from the tyres fitted. These settings can sometimes be affected by excessively worn steering and suspension parts, driving against a kerb, hitting a pothole or other objects in the road.
So, it is worth keeping an eye out for unusual wear on your tyres, such as premature wear on the inside or outside shoulder of your tyres, which may be due to an incorrect wheel alignment setting.
Tip! Wheel alignment is a relatively inexpensive part of keeping your car tyres in tip top condition and maintaining optimum handling for your vehicle, so have your vehicle’s wheel alignment checked regularly by a ‘specialist’.
 
Why fit new valves?

The valve is a small but very important part of a wheel and tyre assembly. It holds the pressure inside the wheel and tyre and is the access point for regulating your tyre pressures with a tyre pressure gauge.
During use, a valve may become damaged or worn, but will inevitably deteriorate through ageing and the forces it is subjected to during its lifetime. For safety reasons, manufacturers recommend new valves be fitted each time a tyre is fitted to a wheel.

It is also worth noting that a number of newer vehicle models have tyre pressure ‘sensor’ valves fitted, these transmit information back to the driver’s dashboard display when a variation from the manufacturer’s specified tyre pressure occurs. A specialist valve fitment is required when replacing this type of ‘sensor’ valve.
Tip! Keeping the valve ‘cap’ clean and clear of dirt will help to keep your valve in optimum working condition. Dirt can sometimes clog up the valve core mechanism, which can lead to valve failure and rapid loss of air from your wheel and tyre assembly.
Valves are relatively inexpensive, but they play a vital role in keeping and controlling your tyre pressures. Always replace the valve when fitting a new tyre or having the tyre repaired, it’s the safety option.
 
Why do we balance wheels?

If your wheels and tyres are not properly balanced the result could be uncomfortable driving and higher vehicle running costs. Your steering wheel may begin to ‘wobble’ at certain speeds and, as the vehicle speed increases, so can the vibrations, causing your steering wheel to ‘wobble’ more violently.
An imbalance in the wheel and tyre assembly may also cause premature wear of suspension and steering components, rotating parts, including your tyres. So, it is vitally important for cost effective smooth driving, that both the front and rear wheels and tyres are kept in balance.

Wheel balancing machines identify the point to fit a counter weight in order to smooth out the vibrations that occur when joining a wheel and tyre unit together. As a result of wheel balancing, you should notice a smoother ride and better wear from your tyres, saving you time and money.
Tip! Manufacturers do recommend that the wheel and tyre assembly is balanced before fitting to the vehicle. Always ask for wheel balancing when having a tyre repaired and keep your spare tyre balanced too, you never know if you’ll need it.

Is it a good idea to rotate your tyres?

Many tyre manufacturers agree that it is no longer good practice to rotate your tyres in order to extend their legal life.
The reasons for this are;
*    Partly worn tyres are more likely to experience punctures – particularly in wet weather conditions.
*    Front tyre deflation will create an under-steer effect, which is easier to control than over-steer (the effect produced by a rear tyre deflation)
*    In the unlikely event that a tyre deflates suddenly, then it is easier to control the vehicle if this occurs at the front of the vehicle. For improved handling and stability it is now recommended that the ‘best’ tyres, those with the most tread, should always be fitted at the rear of the vehicle. This is irrespective of whether the car is front or rear wheel drive.
Tip! Always fit your ‘best’ tyres to the rear. If you are replacing a single tyre then this should be paired with the rear with the tyre having the most tread depth. There are some circumstances when this advice does not apply, such as;
*    Where front and rear tyre sizes are designed to be different
*    Where a vehicle is designed to have directional tyres at the front and asymmetric at the rear
*    If you are not sure about the fitment on your vehicle, then contact your local centre manager for advice
 
Why spare tyres
are important?
The spare tyre provides the means to get you on your way should one of your car tyres fail. You never know when or where a tyre may suffer a puncture and lose all its air pressure, so the spare tyre is as important as those in daily use.
It is therefore vital to familiarise yourself with the location of the tools you need to change a tyre, like the car jack and a wheel wrench to remove the bolts. It is also useful to carry a pair of gloves in your boot; changing a car tyre can be a dirty job and one that you may need to do under difficult circumstances.
Being prepared and having a good fully inflated spare tyre can help to get you out of a jam when you need to most.
Tip! Always include your spare tyre on a routine vehicle tyre pressure check. If your vehicle’s spare tyre is a ‘space saver’ tyre, then always read the label for usage and directions.
It is worth noting that some tyres fitted may carry a directional or asymmetrical tread pattern design. These types of tyre tread patterns are designed to fit specific sides of the vehicle, called nearside or offside. If you are not sure if your spare tyre requires special fitting instruction or you would like some advice, please consult a specialist, at the earliest opportunity.
 
Do tyre repairs have a safety mark?

The two different tyre repairs are major repairs and minor repairs. A tyre repair then, is not as straight forward as you first might think. It is important that a tyre must always be checked thoroughly by a specialist, before it is deemed repairable.

A tyre should not be repaired if it shows signs of ageing or deterioration of the rubber, cuts, cracks or run flat damage. Similarly, if the tyre has suffered bead damage, exposed cords or from a poor repair previously and if the tyre has 1.6mm of tread or less then the tyre must not be repaired.
Tip! If you are in any doubt that a tyre may or may not be repairable then do not repair it. For safety’s sake it is better to err on the side of caution.

Always seek qualified advice and a recommendation after the tyre has been inspected both externally and internally for damage, by a qualified person.
It is also worth noting that a ‘tyre repair’ is not always the most economical solution available. For example, if the tyre tread depth is low, the cost of the repair may be greater than the value of the remaining tread depth.

Therefore, you may wish to consider how long the tyre could last and how much mileage you expect to cover annually before you have the tyre repaired. Ask a specialist for a tyre quotation before having the tyre repaired as the most effective solution may simply be to replace the tyre.

(Other information sourced from the Internet)
Feedback on these and other consumer related stories can be sent to bhembe5@yahoo.com)

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