by Kara Bishop
VehicleMD Staff Writer
Originally published in Fall 2011 Issue

When we think of the shock absorbers on our vehicles, we often think comfort. “Shocks,” as they’re called for short, do play a vital role in how bumpy the ride is, but they are imperative to safe driving, as well. Neglecting your vehicle’s shocks could mean the difference between stopping on a dime and running into that tree you didn’t see until the last second.

What are shocks and struts? One of the core components of the suspension system, the primary purpose of a shock absorber is to hold the tires to the road. This provides for a smoother ride—and a safer one, too. Struts are seen on newer vehicles in place of shocks. Because they are compact, struts allow for more interior space and a lighter vehicle. They not onl y control the vertical motion of the tire, but contribute to the steering’s pivotal rotation, as well.

Shocks and struts affect the drivability of the vehicle, but they can also impact braking, traction, handling and even tire tread wear. Most manufacturers recommend replacing and inspecting the suspension system at regular intervals, with most recommending having your shocks inspected every 12,000 miles and replaced every 50,000 miles.

Warning Signs for Warn Shocks:
Nose diving when braking Dented or damaged housing Steering wheel vibration Car veers in side winds Excessive lean or sway on turns Uneven tire wear Excessive bounce on rough surfaces Oil leaks from shocks or struts

According to experts, an example of how worn shocks can affect braking ability is if you were travelling at 50 miles per hour and needed to stop suddenly. Having a single shock that is 50 percent degraded can add more than 12 feet to the distance at which you would be able to stop. Those 12 feet could be the difference between a safe stop and a major crash.

Worn shocks and struts can also impact emergency maneuvers and increase the risk of a crash. Being able to steer away from hazards on the road is crucial for safe driving, and having your shocks inspected routinely and replaced when needed, can greatly increase your chance of missing the potential dangers on the road.

While the so-called “bounce test” (where you push down on the front bumper and then let go) used to be useful for identifying worn shocks or struts, today’s more complex suspension systems generally require a visual or physical inspection. If you notice your car “wallowing” through curves or bouncing at stop signs, it could be time to bring the car to an auto technician to see if the shocks need to be replaced.

After all, it’s not just about comfort. It’s about safety, too.