Car Suspension Repairs

 Zax All Kars Pty Ltd

Lic. No. MVRL 46247

  Located In Kirrawee Sutherland Shire 



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Car Suspension & Shock Absorber

& Spring Repairs

Suspension Info

When people think of automobile performance, they normally think of horsepower, torque and zero-to-60 acceleration. But all of the power generated by a piston engine is useless if the driver can't control the car. That's why automobile engineers turned their attention to the suspension system almost as soon as they had mastered the four-stroke internal combustion engine.

The job of a car suspension is to maximize the friction between the tyres and the road surface, to provide steering stability with good handling and to ensure the comfort of the passengers. In this article, we'll explore how car suspensions work, how they've evolved over the years and where the design of suspensions is headed in the future.

If a road were perfectly flat, with no irregularities, suspensions wouldn't be necessary. But roads are far from flat. Even freshly paved highways have subtle imperfections that can interact with the wheels­ of a car. It's these imperfections that apply forces to the wheels. According to Newton's laws of motion, all forces have both magnitude and direction. A bump in the road causes the wheel to move up and down perpendicular to the road surface. The magnitude, of course, depends on whether the wheel is striking a giant bump or a tiny speck. Either way, the car wheel experiences a vertical acceleration as it passes over an imperfection.


Without an intervening structure, all of wheel's vertical energy is transferred to the frame, which moves in the same direction. In such a situation, the wheels can lose contact with the road completely. Then, under the downward force of gravity, the wheels can slam back into the road surface. What you need is a system that will absorb the energy of the vertically accelerated wheel, allowing the frame and body to ride undisturbed while the wheels follow bumps in the road.

The study of the forces at work on a moving car is called vehicle dynamics, and you need to understand some of these concepts in order to appreciate why a suspension is necessary in the first place. Most automobile engineers consider the dynamics of a moving car from two perspectives:


Ride - a car's ability to smooth out a bumpy road.

Handling - a car's ability to safely accelerate, brake and corner.


These two characteristics can be further described in three important principles - road isolation, road holding and cornering. The table below describes these principles and how engineers attempt to solve the challenges unique to each.

Principle Definition 
Road Isolation The vehicle's ability to absorb or isolate road shock from the passenger compartment Allow the vehicle body to ride undisturbed while traveling over rough roads. Absorb energy from road bumps and dissipate it without causing undue oscillation in the vehicle.
Road Holding The degree to which a car maintains contact with the road surface in various types of directional changes and in a straight line (Example: The weight of a car will shift from the rear tires to the front tires during braking. Because the nose of the car dips toward the road, this type of motion is known as "dive." The opposite effect -- "squat" -- occurs during acceleration, which shifts the weight of the car from the front tires to the back.) Keep the tires in contact with the ground, because it is the friction between the tires and the road that affects a vehicle's ability to steer, brake and accelerate. Minimize the transfer of vehicle weight from side to side and front to back, as this transfer of weight reduces the tire's grip on the road.
Cornering The ability of a vehicle to travel a curved path Minimize body roll, which occurs as centrifugal force pushes outward on a car's center of gravity while cornering, raising one side of the vehicle and lowering the opposite side. Transfer the weight of the car during cornering from the high side of the vehicle to the low side.



Zax All Kars

Zax All Kars Mechanic in Kirrawee Call Us For Car Service, Repairs, Rego Inspections & Blue Slips... 
43 Monro Ave , Kirrawee, NSW, Australia, 2232
Zax All Kars Business Card

Trading Hours

SMS us Free from this page any time about your car problems all time you would like to book for next car service
08:00 AM 05:30 PM
Saturday closed closed
Sunday closed closed


Secure Onsite Parking
Contact Person: Zax All Kars Pty Ltd

Phone: 02 9545 1965
Fax: 02 9545 5054

Zax All Kars Car Mechanic Kirrawee, near Sutherland, Miranda, Jannali, Como, Oyster Bay, Gymea & Kareela
Lic. No. MVRL46247

Our Services Include
Log Book & General Car Service,
Major Service & Mechanical Repairs,
ESafety Checks (Pink Slips) & Blue Slip
Air Conditioning Service, Repair & Regas
Brake & Clutch Repairs,
Gear Box Service,
Transmission Repairs
Fuel Injection,
Power Steering Repairs,
Car Suspension Repairs,
Car Shock Absorber Repairs

Make a booking, SMS your details, desired time of service and we will call you back to confirm. It's that easy.


To the 5 Minute Walk To Kirrawee Train Station
To the Across The Road From Kirrawee Bowling Club