![]() Shocks are filled with oil, and have a piston rod which goes down into the shock under compression. ![]() That’s where the shock comes in, to damp down that oscillation and quickly return the vehicle back the spring’s normal state of extension. But when a spring extends after compression it oscillates like a rubber ball bouncing on concrete. ![]() ![]() It sets the ride height, carries the weight of the vehicle and does a fair bit of absorbing some of the shock when a car goes over anything other than flat ground, or when there’s weight shift as the cars is cornering, braking or accelerating. The spring is usually a leaf, coil or torsion bar. In short, suspension has two main components a spring, and a damper which is also known as a shock. Let’s back up a bit and take a look at why high-performance offroad shocks exist and how they work, then you can see how the different designs stack up. We’re talking about Australian 4WD touring, the harshest proving ground in the world. Each of these designs have pros and cons, but what we’re talking about here is not circuit racing, not rally, not desert racing buggies and definitely not your nan’s Camry. TWIN-TUBE, MONO, REMOTE…there’s so many shock absorber options it’s hard to know which way to look. Everyone knows one of the first offroad modifications is suspension, but it’s tough to figure out which of the many designs is the best for 4WD touring.
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