What Are Coilover Sleeves? Included Pros And Cons

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There is a growing trend of Coilover sleeves being worn by drivers in the motorsports world. They are often confused with shocks, but Coilover sleeves are actually suspension components that use springs to provide damping and stability to the ride.

So, before you decide to upgrade your vehicle’s suspension system with Coilover sleeves, you should learn what coilover sleeves are. Well, Coilover sleeves are a type of suspension system that is often used as a performance enhancement on high-performance cars and can also be used as a daily driver on vehicles with less aggressive suspensions. 

While the benefits of Coilover sleeves are clear, there is still some confusion about what makes them so special. In this article, we will explore the pros and cons of Coilover sleeves, their working mechanism, and how to install them.

What Are Coilover Sleeves?

So, what are coilover sleeves? Let’s dig deeper. Coilover sleeves are a type of suspension system that is used on a number of different types of vehicles. They are most commonly used on SUVs and trucks, but can also be found on cars. 

Coilover sleeves are a type of shock absorber that uses a series of coils to compress and then expand the air inside the suspension system. Technically, coilover sleeves absorb the energy from the bumps in the road and then release it gradually so that the vehicle remains in control. 

They consist of a pair of circular pieces of metal that sit on top of the springs, and they help to distribute the weight evenly across the suspension. This helps to improve the handling and performance of the car.

Coilover Sleeves Pros And Cons

While Coilover sleeves are a popular modification, it is important to do your research before making a decision. This is because they come with their own set of pros and cons. Here we’re going to have a look at both the pros and cons. 


If you are like most drivers, you’ve probably been told by friends, family, and mechanics alike to get Coilover sleeves. And for good reason, they offer a number of benefits that can make your driving experience better. These include:

  • Reduced roadway noise and vibrations: Coilover sleeves help dampen vibrations caused by the car hitting bumps in the road, leading to a quieter ride.
  • Providing better steering accuracy and handling: A well-tuned suspension system will provide better handling in all conditions. When the suspension is compressed and expanded quickly, it causes the wheels to turn more accurately, resulting in better steering and handling characteristics. 
  • Improved cornering stability and traction: Increased suspension travel improves traction and helps keep the car’s tires on the road while cornering.
  • Enhanced ride comfort: By reducing compression and expanding under load, coilovers actually increase suspension travel, which in turn reduces bumpiness and increases comfort.
  • Improved Road-holding capabilities: When you compress the suspension, it increases the tire’s contact patch with its surface. This helps improve cornering stability and grip. It also improves how much of a load the tires can support. 
  • Increased Safety:  Coilover sleeves are designed to reduce the amount of bounce and jolting experienced by the body, which in turn reduces the risk of injury. This is particularly important for those who drive for long periods in aggressive conditions on a daily basis.
  • Less expensive: Compared to other aftermarket suspension modifications, incorporating coilover sleeves is a more reasonable solution. 


Even though Coilover sleeves offer many benefits over a standard suspension system, they also have their own set of drawbacks. 

  • They can reduce lateral stability in a cornering situation. This is because the coilover’s adjustments affect the car’s track at both the front and rear wheels, which can cause it to wander from its intended path.
  • If not properly installed or maintained, coilover sleeves can become worn and lose their ability to adjust smoothly, which could lead to excessive wheel movement and instability on the road. 
  • They are not as durable as stock suspension and tend to break down over time.  
  • When the coilover sleeves are damaged, the entire unit will need to be replaced, which can be expensive. 

How Do Coilover Sleeves Work?

When a car springs and bounces, it causes the driver to feel jolts and bumps in their seat. This is because the suspension system in the car, which includes the springs and shocks, cannot keep up with how fast and high the car is bouncing around.  

These jarring motions can cause pain in your back or neck, and they can also damage your vehicle’s suspension system. One way to try to avoid these problems is by using Coilover sleeves. 

However, many people are unfamiliar with Coilover sleeves and the ways they work on vehicles. Coilover sleeves are essentially a type of suspension system that uses springs to extend or compress the air pressure in a chamber above the axle.

This system is designed to modify the handling of a vehicle and can be found on both street and race cars. In general, Coilover sleeves work by allowing more air to flow through the suspension, which makes it softer and allows for increased cornering speeds. 

When the driver presses down on the accelerator, the suspension springs compress, and this movement sends a signal through the Coilover system to the shock absorbers. These units then adjust their length and pressure in order to keep the car at its desired height. 

How To Install Coilover Sleeves

Are you looking to Install Coilover Sleeves to improve your car’s suspension? Installing Coilover sleeves can be a daunting task, but with the right tools and instructions, the process can be easily completed. The process is usually a mess and takes a lot of time. If you’re looking to save time and hassle, then follow these simple steps. 


To assemble the sleeve, begin with the smallest o-rings you’ve just prepared on the sleeve followed by rolling them onto the shock. Subsequently, it is critical that you lay the middle of the o-rings flat side by side on the shock. When completed, make certain that there isn’t any slop (wiggle) once the sleeve assembly is put on the shock. Attempt the next size up for the O-rings. 

If you observe that the o-rings are a bit large, keep on to step 2. Related, if the next size looks slightly larger than required. You should search for a size in between the previous one and the one shown in the picture. 


As you have the right O-rings, not no coilover suppliers will give you just two O-rings of each size. (That’s two for each shock! Regardless of how logically you devised a strategy.) Hence, most Coilover makers advise two o-rings per shock, but you should always make use of the extra o-rings for shocks, too. 

You’d be wise to use at least 4 o-rings per shock for lasting security from the sleeve to the shocks. Now it’s time to use electrical tape. You have to maintain the bottom o-ring in place by securing 5-6 small strips of that electric tape parallel to the o-ring. 

Then, tear off two long strips and wrap them securely around the ends of the smaller ones. Do this with all the O-rings used in the process.


Always check the o-rings are on their rollers before moving the coilover sleeve. After each and every o-ring is fastened into place, lubricate the metal hub that contains them. Also, lubricate the Coilover sleeve that holds the assembly in place while it’s mounted. 

Once you’ve checked that the inside is as slippery as a bar of soap, push on the coilover sleeve to lower the assembly into shape. It should be a snug fit! You’ve finished until next time.

Frequently Asked Questions

How do you adjust coilover sleeves?

There are a few ways to adjust coilover sleeves. One is to use a screwdriver or pliers to loosen the screws on the top of the sleeve and then slide it up or down the shock shaft. Another way is to use an Allen wrench to tighten or loosen the screws on the bottom of the sleeve.

What do coilover sleeves do?

Coilover sleeves are designed to compress the air inside the Coilover suspension system, increasing its spring rate. This increases the handling and performance of your car.

How do I choose Coilover sleeves? 

There are a few things to consider when choosing coilover sleeves. The first is the ride quality you’re looking for. Some sleeves are stiffer and provide a more aggressive suspension response, while others are more supple and offer a smoother ride. The second factor to consider is the size of your car. If you have a small car, then a smaller sleeve might be better suited for you, while if you have a large car, then a larger sleeve may be better.

Final Words

At this point, you might have understood what Coilover sleeves are. Coilover sleeves can help to improve the handling and performance of your car. They are a great way to customize your suspension and increase your driving enjoyment. If you are ever thinking about adding them to your car, be sure to talk to your authorized dealer about the best options for you.

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