What Is a Lift Kit and How Does It Work? (Suspension Lift FAQ)

A Beginner's Guide to Suspension Lifts & Choosing the Right Setup

A lift kit is an aftermarket package of components that raises a truck or SUV's ride height off the ground, either by modifying the suspension or by physically raising the body off the frame. Whether you're looking to fit larger tires, increase ground clearance, or give your vehicle a more aggressive off-road stance, understanding how lift kits actually work is the first step in choosing the right one.

What is a lift kit, and how does it work?

A lift kit raises a vehicle's ride height by either altering the suspension geometry (a suspension lift) or physically elevating the body away from the frame (a body lift). Raising the vehicle increases ground clearance, allows for larger tire fitment, and improves approach, departure, and breakover angles for off-road driving.

What is the difference between a suspension lift kit and a body lift kit?

A suspension lift kit modifies or replaces suspension components, struts, springs, or spacers, to raise the frame and chassis, providing true ground clearance and increased suspension travel for off-roading. A body lift kit uses spacers to raise only the vehicle's body off the frame, without altering the suspension, providing extra room for larger tires and added stance without changing ground clearance under the frame itself.

What's the difference between a leveling kit and a full lift kit?

A leveling kit is a smaller suspension lift, typically 1"-3", designed mainly to correct the factory rake many trucks have (where the rear sits noticeably higher than the front) and even out the stance. A full lift kit goes further, and is built for larger tires and more serious off-road capability. Both are types of suspension lift - leveling kits are really just the smaller end of that range. Browse 1"-3" leveling and lift kits to compare options at each height.

How do spacer lift kits work?

Spacer lift kits work by adding metal or composite spacers to the top or bottom of a vehicle's factory struts, coil springs, or leaf springs. Extending the overall length of the strut or spring assembly pushes the axle downward or the suspension upward, raising the vehicle's ride height. Spacer kits, commonly used in 1"-3" leveling and lift applications, are popular because they maintain ride quality close to factory and offer a straightforward and cost-effective option without a full suspension overhaul.

What components are included in a suspension lift kit?

Depending on the vehicle and lift height, a suspension lift kit may include:

• Strut spacers, lifted struts, spring spacers, or torsion keys to raise the front end
  
• Rear lift blocks, shackles, or add-a-leaf springs to elevate the rear leaf spring assembly
  
• Upgraded shocks, extended in length to accommodate the new ride height
  
• Aftermarket upper control arms (UCAs): for TORCH kits, recommended in the 2"-3" lift range and typically necessary above 3" for alignment and suspension travel. See our Upper Control Arm FAQ for the breakdown and recommendations
  
• Differential drop kits and hardware, which help keep CV axle angles within recommended operating range on 4WD vehicles

How do I choose the right lift kit for my truck or SUV?

A few factors matter most:

• Vehicle year, make, and model: Lift kits are vehicle-specific. Confirm compatibility with your drivetrain (2WD or 4WD), suspension type, and trim before buying.
  
• Desired lift height: 1"-3" lifts suit leveling the stance, daily driving, and moderate off-roading. 3.25"-6"+ lifts are typically needed for extreme off-roading, rock crawling, or fitting 35" or larger tires.
  
• Primary vehicle usage: Mostly street or highway driving points toward a leveling or spacer kit that keeps a near-stock ride feel. Frequent trail use points toward a full suspension lift with upgraded shocks and control arms.
  
• Budget: Costs generally range from spacer kits under $150 to comprehensive high-clearance systems over $1,000. Higher lifts typically need more supporting components.

Check out TORCH's full suspension lift kit lineup by vehicle, or contact us for a build recommendation.

Will installing a lift kit affect my daily driving and ride quality?

A quality lift kit that maintains proper suspension geometry will preserve a ride feel close to the factory ride. That said, higher lifts raise the vehicle's center of gravity, which can cause slightly more body roll during sharp turns. A few things help keep ride quality and safety on point after a lift: a four-wheel alignment immediately after installation, upgraded upper control arms if lifting beyond 3 inches, and extended shocks suited for lifted applications.

Does a lift kit affect fuel economy?

Generally, yes, to some degree. Larger, heavier tires and a change in the vehicle's aerodynamics typically reduce fuel economy somewhat after a lift. How much varies by vehicle, tire size, lift height, and driving habits. It’s reasonable to expect some slight reduction in mileage with a lift.

What size tires can I fit with a lift kit?

It depends on the vehicle and lift height, but as a loose guideline:

• 1"-3" lift / leveling kit: generally 32"-33" tires without rubbing
  
• 4"-5" lift kit: typically 33"-35" tires
  
• 6"+ lift kit: up to 35"-37"+ off-road tires

Specific wheel offset, backspacing, and fender trimming may still be required depending on your vehicle and suspension setup. These are general starting points, not guarantees for every build.

Will a lift kit affect my warranty or pass inspection?

For most vehicles, a lift kit alone won't void your entire factory warranty. See our FAQ on Lift Kits and Warranty for the breakdown of how that works. Inspection and on-road legality rules for lifted vehicles vary by state and county, covering things like maximum lift height, bumper height, and lighting requirements. Check your DMV or local authority for what applies in your area before finalizing your build.

The bottom line

Understanding how suspension and body lift kits work, and which components matter at your target lift height, makes it much easier to choose a setup that fits your vehicle and how you intend to drive it. Browse TORCH Off Road's suspension lift kits by make and model, or contact us if you'd like a build recommendation for your truck or SUV! -TORCH