Shock absorbers are suspension components that control the impact and rebound movement of a vehicle’s springs and suspension. They keep your tyres in contact with the road surface: an action that is crucial for safe braking, steering, and overall handling. In essence, they absorb and dampen the energy from bumps and uneven road surfaces, providing a smoother, more controlled ride

While both shocks and struts serve a similar purpose in damping suspension movement, they have a key structural difference:

• Shocks: A shock absorber is an independent component that works in conjunction with other suspension parts. Its sole purpose is to control the spring’s oscillations.
• Struts: A strut is a structural part of the suspension system. It replaces the upper control arm and serves as a pivot point for the steering knuckle. Because of this, struts are more robustly built to handle greater loads and forces.

Here are the common signs your shock absorbers are wearing (or completely worn) out:

• Bumpy ride: You’ll feel bumps and imperfections in the road more intensely.
• Braking problems: The front end of your vehicle may ‘nosedive’ or dip when you apply the brakes, potentially increasing your stopping distance.
• Steering issues: Your vehicle might sway or feel unstable during turns, or you may notice a drifting sensation.
• Uneven tyre wear: Worn shocks can cause ‘cupping’ or scalloped dips on the tyre tread (because the tyres are not being held firmly to the road).
• Fluid leaks: If hydraulic fluid leaks from the shock absorber body, it’s a clear indication that the seals are worn and the shock needs to be replaced.
• Vibrations: Excessive vibration through the steering wheel, especially at higher speeds, can be a sign of failing shocks.

While there is no one-size-fits-all answer, the general guideline is to have shock absorbers inspected every 80,000 kilometres and replaced every 80,000 to 160,000 kilometres. That said, shock absorber lifespans will vary by driving habits, the road types frequented, and the quality of the components themselves.

Aftermarket shocks offer several advantages:

• Improved performance: Aftermarket shocks are often designed to provide better handling, stability, and control, especially for performance driving or off-road use.
• Customisation: They are available in a wide range of options, allowing you to tailor your vehicle’s suspension to your specific driving style and needs.
• Durability: Many aftermarket shocks are built with higher-quality materials and construction than OEM parts, leading to a longer lifespan.
• Adjustability: Some aftermarket shocks are adjustable, allowing you to fine-tune the damping characteristics for a personalised ride.

There are several types of aftermarket shock absorbers, each designed for different applications:

• Twin-tube: The most common and affordable type, suitable for general-purpose use.
• Monotube: A higher-performance option that offers better heat dissipation and more consistent damping.
• Gas-charged: These shocks use nitrogen gas to prevent the hydraulic fluid from foaming, which improves performance and consistency.
• Adjustable: These allow you to manually or electronically adjust the stiffness of the shock, giving you control over your ride quality and handling.
• Coilover: A type of shock absorber that has a coil spring encircling it. Coilovers are often used in performance and racing applications as they allow for ride height and damping adjustments.
• Heavy-duty: Designed for trucks, SUVs, and other vehicles that carry heavy loads or are used for towing.

When choosing aftermarket shock absorbers, consider the following:

• Your vehicle: Make sure the shocks are compatible with your vehicle’s make, model, and year.
• Your driving style: If you’re a spirited driver or enjoy track days, you’ll want performance-oriented shocks. If you primarily use your vehicle for commuting, comfort-oriented shocks might be a better choice.
• Your vehicle’s use: If you frequently tow or haul heavy loads, heavy-duty shocks are a must. For off-road enthusiasts, shocks designed for rugged terrain are essential.
• Your budget: Aftermarket shocks are available at various price points. Determine your budget and look for the best option within that range.

Whether aftermarket shocks are ‘better’ than OEM shocks depends on your specific needs and preferences.

• OEM shocks: Designed to provide a balance of comfort and handling that suits the average driver. They are a direct replacement for the original shocks and guarantee a factory-like ride.
• Aftermarket shocks: Can offer superior performance, durability, and customisation options. However, it’s important to choose a reputable brand to ensure quality and proper fitment.

For most drivers, high-quality aftermarket shocks can be a significant upgrade over OEM parts.

Yes, it is highly recommended that you replace shock absorbers in pairs (both front shocks or both rear shocks). This is because a new shock will have different damping characteristics than a worn one, which can lead to unpredictable handling and instability if only one is replaced.

Yes, if you lower your vehicle by more than 2.5–5cm, you will likely need shorter shock absorbers that are specifically designed for lowered vehicles. Using standard-length shocks on a lowered car can cause them to bottom out, leading to damage and a poor ride.