Can You Add Spacers to a Lift Kit​: Clear Answers and Key Facts

Modifying a vehicle’s suspension system, particularly when combining different lift components, requires a thorough understanding of their interaction. Incorrectly adding spacers to an existing lift kit can lead to severe handling issues, premature wear of components, and even dangerous structural failures. A careful explanation of how these components work together, and the potential pitfalls, is essential to ensure both the safety and performance of your vehicle. The question “can you add spacers to a lift kit​” becomes clearer once the surrounding conditions and practical details are considered.

Yes, you can add spacers to a lift kit, but it’s a decision that requires careful consideration of several factors, including the type of existing lift, the vehicle’s design, and the desired outcome. This modification is often done to achieve additional height, correct an uneven stance, or fine-tune suspension geometry. However, it’s not a universally recommended practice and comes with specific caveats and potential drawbacks that must be understood before proceeding.

Understanding Lift Kits and Spacers

Before delving into the specifics of combining these components, it’s crucial to understand what each entails individually.

What is a Lift Kit?

A lift kit is a comprehensive suspension modification designed to increase a vehicle’s ground clearance and often accommodate larger tires. Lift kits typically involve replacing or modifying multiple suspension components to achieve the desired height while maintaining proper suspension geometry and ride quality. They can range from mild leveling kits to extensive long-travel systems.

Common components in a lift kit include:

• New Coilovers or Shocks: Longer shocks and springs (or coilovers) replace the factory units, providing increased travel and height.
• Control Arms: Longer or adjustable control arms are often included to correct caster and camber angles, which are altered by the increased ride height.
• Track Bars: Adjustable track bars recenter the axles under the vehicle.
• Brake Lines: Extended brake lines may be necessary to prevent stretching or damage at full suspension droop.
• Driveshaft Modifications: In some cases, driveshaft modifications or replacement may be needed to prevent vibration or binding.

What are Spacers?

Spacers, in the context of suspension, are components designed to be installed above or below existing springs or coilovers to add height. They are generally a more economical and simpler way to achieve a modest lift compared to a full lift kit. Spacers primarily come in two forms:

• Coil Spacers: These are typically made of polyurethane, aluminum, or steel and are installed on top of the coil spring or between the coil spring and its perch. They effectively extend the length of the spring assembly.
• Strut Spacers: For vehicles with strut-based suspensions, these spacers are installed between the top of the strut assembly and the vehicle’s frame or strut tower. They push the entire strut assembly downwards, increasing ride height.

Spacers provide lift by physically increasing the distance between the suspension mounting points and the axle or control arms. They do not increase suspension travel or change the spring rate, unlike a full lift kit.

Reasons to Add Spacers to an Existing Lift Kit

While often debated, there are several scenarios where individuals consider adding spacers to an already lifted vehicle:

• Achieving Additional Height: The most common reason is to gain a few extra inches of lift beyond what the existing kit provides, often to clear even larger tires or achieve a specific aesthetic.
• Leveling the Vehicle: Many lift kits provide a uniform lift front and rear, but some vehicles naturally have a factory rake (front lower than the rear). Adding a small spacer to the front of a lifted vehicle can help achieve a level stance.
• Correcting Sag: Over time, springs can sag, especially if heavy accessories (winches, heavy bumpers) are added. Spacers can compensate for this sag and restore the desired ride height.
• Cost-Effectiveness: If only a small amount of additional lift is needed, adding spacers can be more cost-effective than replacing an entire lift kit.

Compatibility and Considerations When Adding Spacers to a Lift Kit

The primary keyword for this article is can you add spacers to a lift kit​. The answer, as established, is yes, but with significant caveats. The success and safety of this modification depend heavily on the type of existing lift kit, the vehicle’s design, and the amount of additional lift desired.

Type of Existing Lift Kit

The nature of your current lift kit plays a critical role in whether adding spacers is advisable:

• Basic Leveling Kits: If your current “lift” is essentially just strut spacers or coil spacers, adding more spacers on top of these is generally not recommended. Stacking spacers can quickly lead to excessive angles and component stress.
• Coilover-Based Lift Kits: For kits that replace factory coilovers with longer, adjustable aftermarket units, adding a small top-hat spacer (between the coilover and the frame) might be feasible if the coilover itself has enough droop travel remaining and the overall lift remains within acceptable limits for other components.
• Full Suspension Lift Kits (with new springs/shocks/control arms): These kits are designed as a complete system. Adding spacers can disrupt the engineered geometry. If the kit already includes extended control arms and other corrective components for a specific lift height, adding more height via spacers can push those components beyond their optimal operating range.

Impact on Suspension Geometry

Every inch of lift significantly alters suspension geometry. When you add spacers to an existing lift, you are further exacerbating these changes:

• Caster Angle: This affects steering stability. Too much positive caster can make steering heavy; too little can make it twitchy. Spacers further reduce positive caster.
• Camber Angle: This affects tire wear and handling. Excessive positive or negative camber leads to uneven tire wear. Spacers typically increase negative camber on independent front suspensions.
• Toe Angle: This affects tire wear and steering response. Incorrect toe can cause rapid tire wear and wandering.
• Ball Joint and Tie Rod Angles: Increased lift puts more severe angles on these crucial steering and suspension components, leading to premature wear and potential failure.
• Control Arm Angles: Control arms operate at steeper angles, reducing their effectiveness and potentially binding at full droop or compression.

Limitations of Other Components

A full lift kit accounts for various components. Adding more lift with spacers can push these beyond their design limits:

• Driveshaft Angles: Increased lift, especially on the rear axle, can create excessive driveshaft angles, leading to vibrations, U-joint wear, and even driveshaft failure.
• Brake Lines: While a full lift kit often includes extended brake lines, additional lift from spacers might require even longer lines to prevent stretching during full suspension droop.
• ABS and Sensor Wires: These wires can be stretched or damaged if not properly extended or rerouted with additional lift.
• Steering Components: Tie rods, drag links, and other steering components can be put under increased stress and operate at extreme angles, leading to premature wear or failure.
• Shock Travel: Spacers do not increase shock travel. If your existing lift kit’s shocks are already at their maximum extension or compression limits for the current lift, adding spacers will further reduce available downtravel or risk bottoming out the shocks.

Ride Quality and Handling

Adding spacers to a lift kit almost universally has a negative impact on ride quality and handling:

• Stiffer Ride: While spacers don’t change spring rate, they can make the ride feel harsher by reducing available suspension travel and pushing components into less optimal operating ranges.
• Reduced Articulation: The effective travel of your suspension can be reduced, limiting articulation off-road.
• Increased Body Roll: A higher center of gravity combined with compromised suspension geometry can lead to increased body roll and a less stable feeling, especially during cornering.
• Steering Issues: Vague steering, bump steer, and wandering are common side effects of excessive lift and poor geometry.

Potential Risks and Drawbacks

The decision to add spacers to an existing lift kit is not without significant risks:

• Premature Component Wear: Ball joints, tie rods, control arm bushings, CV joints (on independent front suspension), U-joints, and shocks will all wear out much faster due to operating at extreme angles.
• Component Failure: In extreme cases, components can fail catastrophically, leading to loss of control, especially off-road or during sudden maneuvers.
• Poor Ride Quality: As mentioned, the ride can become harsh, bouncy, and uncomfortable.
• Reduced Safety: Compromised handling, braking, and steering can make the vehicle unsafe to drive, particularly at higher speeds or in emergency situations.
• Alignment Issues: Achieving and maintaining proper wheel alignment becomes significantly more challenging, leading to rapid and uneven tire wear.
• Warranty Voidance: Many manufacturers and even aftermarket lift kit companies will void warranties if components are improperly modified or combined.

Best Practices and Alternatives

If you are considering adding spacers to a lift kit, it’s crucial to approach it with caution and understand the alternatives.

When it Might Be Acceptable (with extreme caution)

In very specific, limited scenarios, and with professional guidance, a small spacer might be considered:

• Minor Leveling: If your existing lift kit leaves your vehicle with a slight front-end rake (e.g., 0.5-1 inch difference), a small top-hat strut spacer (0.5-1 inch) might be used to level it out, provided the existing lift is not already pushing geometry limits. This is more common with basic 2-3 inch lift kits.
• Compensating for Minor Sag: If heavy accessories have caused a slight sag, a small spacer might temporarily restore height, but addressing the root cause (e.g., heavier springs) is a better long-term solution.

Even in these cases, a professional alignment is absolutely mandatory after installation, and a thorough inspection of all suspension and steering components is critical.

Professional Consultation is Key

Before making any decision, I strongly recommend consulting with a reputable off-road shop or suspension specialist. They can assess your current setup, vehicle type, and desired outcome, and provide an informed opinion on whether adding spacers is feasible or advisable for your specific situation. They can also recommend appropriate corrective components if necessary.

Better Alternatives to Adding Spacers

Instead of stacking spacers on an existing lift, consider these more robust and safer alternatives:

• Upgrade to a Taller Lift Kit: If you need significantly more height, the safest and most effective solution is to upgrade to a full lift kit designed for the desired height. These kits are engineered as a complete system to maintain proper geometry and ride quality.
• Heavier Duty Springs: If your vehicle is sagging due to heavy accessories, installing heavier-duty springs (e.g., constant load springs) designed for the added weight will restore height and improve load-carrying capacity without compromising geometry.
• Adjustable Coilovers: If your current lift uses adjustable coilovers, you might be able to gain a small amount of additional height by adjusting them, provided they have enough thread remaining and are within their safe operating range.
• Body Lift: A body lift raises the vehicle’s body from the frame, providing clearance for larger tires without altering suspension geometry. This is a good option if you only need tire clearance and not increased suspension travel. However, body lifts have their own set of considerations.
• Extended Length Shocks: If your current shocks are limiting downtravel, installing longer shocks designed for the increased height can improve articulation, but this must be paired with springs and other components that support the new height.

Installation and Post-Installation Procedures

If, after careful consideration and professional advice, you decide to proceed with adding spacers to a lift kit, the installation process is critical, as are the post-installation checks.

Installation Steps (General)

1. Safety First: Always work on a level surface with the vehicle properly supported by jack stands. Disconnect the battery.
2. Remove Wheels: Lift the vehicle and remove the wheels.
3. Disassemble Suspension: Depending on whether you’re adding coil spacers or strut spacers, you’ll need to partially disassemble the suspension. This might involve disconnecting sway bar links, brake lines (if not already extended), and upper or lower control arms to allow the suspension to droop enough.
4. Install Spacers: Carefully place the spacers in their designated location (e.g., on top of the strut assembly, or between the coil spring and its perch).
5. Reassemble Suspension: Reconnect all components, ensuring all bolts are torqued to manufacturer specifications. Pay close attention to brake lines and sensor wires to ensure they are not stretched or pinched.
6. Lower Vehicle: Carefully lower the vehicle and re-install the wheels.

Post-Installation Essentials

• Professional Alignment: This is non-negotiable. Any change in ride height, even minor, will throw off your alignment. An alignment shop specializing in lifted vehicles should perform this.
• Test Drive: Perform a cautious test drive to check for any unusual noises, vibrations, or handling characteristics. Pay attention to steering response and braking.
• Re-torque: After about 50-100 miles, re-torque all suspension bolts. Components can settle, and bolts can loosen.
• Inspect Components: Regularly inspect all suspension, steering, and driveshaft components for signs of premature wear, rubbing, or damage.

Conclusion

The question, can you add spacers to a lift kit​, has a qualified “yes” as an answer, but it’s a modification fraught with potential complications and risks. While it might offer a seemingly simple and cost-effective way to gain additional height or level a vehicle, it often comes at the expense of suspension geometry, component longevity, ride quality, and overall safety. For most applications, especially those involving significant additional lift, I strongly advise against stacking spacers on an existing lift kit. Instead, consider upgrading to a more comprehensive lift system designed for the desired height, or exploring other alternatives like heavier springs or a body lift. Always prioritize safety and consult with suspension professionals to ensure your vehicle remains reliable and performs as intended.