Why Tyre Pressure and Wheel Alignment Matter More Than You Think

Your vehicle manufacturer specifies a recommended tyre pressure based on factors such as the vehicle's weight, suspension setup, tyre size and intended load. Running the wrong pressure changes the way the tyre contacts the road. And even a small pressure difference can affect how your vehicle drives.

Too Much Pressure. When your tyres are overinflated, the centre of the tread can carry more of the load. This can result in reduced contact with the road, less predictable handling, a harsher ride, uneven tyre wear and reduced grip in certain conditions.

Too Little Pressure. Underinflated tyres can be even more problematic. They can cause increased rolling resistance, higher fuel consumption, excessive tyre heat, increased sidewall flex, poor handling, uneven tread wear and potential tyre damage. On a heavy bakkie carrying a load or towing a trailer, maintaining the correct pressure becomes even more important.

Your Tyre Pressure Isn't a "Set It Once" Number. One of the biggest mistakes drivers make is checking their tyre pressure once and forgetting about it. Tyre pressure naturally changes over time, and temperature also affects pressure. Your vehicle can also require different pressures depending on whether you're driving normally or carrying a heavy load. The correct pressure for your vehicle can usually be found on the manufacturer's tyre-pressure sticker, commonly located on the driver's door frame, door pillar or inside the fuel flap. Always check pressures when the tyres are cold.

What About 4x4s? This becomes even more important when you leave the tar. Off-road driving sometimes requires different tyre pressures depending on the terrain, tyre construction, vehicle weight and conditions. Lowering tyre pressure can increase the tyre's footprint and improve traction on certain surfaces such as sand. However, there isn't one universal "off-road pressure." The correct pressure depends on the vehicle, tyre and terrain, and going too low can increase the risk of damaging the tyre or wheel. If you're unsure, it's better to get advice based on your specific setup rather than simply copying another vehicle's pressures.

What Is Wheel Alignment? Wheel alignment is the process of checking and adjusting the angles of your vehicle's wheels so they are positioned correctly relative to the vehicle and the road. The main alignment angles include toe, camber and caster. If these angles aren't within the appropriate specifications, your vehicle may not drive or wear its tyres correctly.

What Happens When Your Wheels Are Out of Alignment? One of the most obvious signs is uneven tyre wear — you may notice the inside or outside edge of a tyre wearing significantly faster than the rest of the tread. Other signs can include the vehicle pulling to one side, the steering wheel sitting off-centre, the vehicle feeling unstable, steering feeling different from normal and tyres wearing unusually quickly. Sometimes the symptoms are subtle, which is why alignment checks can be worthwhile even when the vehicle doesn't feel obviously wrong.

Why Is Alignment Especially Important After a Lift? When you change the suspension geometry by fitting a lift kit, leveling kit or other suspension components, the relationship between the wheels and suspension can change. Depending on the vehicle and the type of suspension modification, an alignment may be required afterwards. The same applies after certain suspension repairs or component replacements. Fitting bigger wheels and tyres can also change the way the vehicle behaves, although wheel and tyre size itself doesn't automatically mean the alignment is incorrect.

What About Hitting a Pothole? South African roads aren't exactly famous for being gentle on suspension and wheels. A hard pothole, kerb impact or off-road obstacle can potentially affect alignment components. If you've hit something hard and suddenly notice that your steering wheel is no longer straight, the vehicle pulls to one side, or your tyres are wearing differently, it's worth having the vehicle checked.

Alignment Isn't Just About Tyre Wear. It's easy to think of wheel alignment as something you only do to prevent expensive tyres from wearing out. But proper alignment can also contribute to predictable handling and steering behaviour. Your vehicle's suspension and steering systems are designed to work within specific geometric parameters. When those parameters change, the way the vehicle responds can change too.

How Often Should You Check Your Tyre Pressure? Make checking your tyre pressures part of your regular vehicle maintenance routine. It's particularly important to check them before long road trips, towing, carrying heavy loads, going off-road and long-distance touring. And don't forget about the spare wheel — a perfectly maintained set of tyres doesn't help much if your spare has been sitting under the vehicle for two years with almost no air in it.

How Often Should You Have a Wheel Alignment? There isn't one universal interval that applies to every vehicle. Alignment should be checked when there are signs of a problem, after certain suspension work, or when recommended by your vehicle manufacturer or suspension specialist. It's also worth checking after a significant impact or when fitting certain suspension upgrades.

Don't Ignore the Things You Can't See. Tyres might look perfectly fine from the outside while having incorrect pressure or uneven wear. Likewise, your vehicle might drive reasonably straight while its alignment isn't quite where it should be. A few minutes checking tyre pressures and having the alignment inspected when necessary can help protect your tyres, improve handling and prevent unnecessary costs down the road. At Rhino Customs, we can help with your wheels, tyres, suspension and 4x4 setup to make sure your vehicle is properly prepared for the way you actually use it. Visit us at Unit 2, 12 Brick Road, George Industria or call 076 068 7668.