We get this question a lot, "Why is my spacer not the same thickness as the advertised Lift?"

For vehicles with independent suspensions systems, the answer is more or less physics. The lift amount and the spacer thickness will NOT be the same, in order to lift your vehicle the advertised height, it is necessary that the spacer is less than the lift amount. The suspension (lower control arm) compounds the amount of lift due to both its length and angle and that is the reason why the spacer needs to be smaller than the lift amount.

Independent suspension designs typically consist of at least one control arm, the inside of which is secured to the frame while the outside is attached to the wheel. It is supported by a spring or strut mounted someplace between the wheel and the frame. Suspension travel is accomplished by the control arm pivoting at the point where it is mounted to the frame. Since the wheel is mounted farther from the control arm pivot than the strut is, it experiences a longer travel than the strut does. For example, installing a 1.5” thick strut spacer on independently suspended vehicles can act as 3” lift kits.

*If you order a spacer and it's not the thickness you thought it would be, don't fret, rest assured, you will receive the advertised lift height once the kit is installed.

Now you know.