Lift kit

Also called suspension lift, leveling kit, body lift, lifted truck

A lift kit raises a vehicle's ride height, most often to clear bigger tires, either by replacing the suspension parts that space the axles from the frame, which genuinely gains clearance, or by inserting spacer blocks between the body and the frame, which raises the sheet metal without moving the axles at all.

What is a lift kit?

Three different jobs travel under the one name, and mixing them up is the most common mistake a first-time buyer makes. A suspension lift replaces the springs, shocks and often the control arms, and it raises the axles themselves relative to the frame, which is a real gain in ground clearance and usually in wheel travel too. A body lift does none of that: it bolts spacer blocks between the body and the frame, raising the fenders and the sheet metal to clear a bigger tire while the axles, the frame and the actual clearance underneath stay exactly where they started. A leveling kit is smaller still, usually one to three inches at the front only, and it exists because most trucks leave the factory sitting a little higher at the rear than the front to handle payload; a leveling kit restores a level stance rather than adding real clearance anywhere.

All three let a truck swallow a bigger tire. Only the first two change what happens when a rock or a rut is directly under the frame rather than under a fender.

Why people fit one

Tire clearance is the practical reason: a bigger tire needs more room to articulate without rubbing, and a lift buys that room. Genuine ground clearance and better approach, breakover and departure angles follow from a suspension lift specifically. Looks are the other reason, and there is nothing wrong with that one either, though it is worth being clear with yourself about which reason you are buying for, since a body lift satisfies the second and does almost nothing for the first.

What it costs

Raising the vehicle raises its centre of gravity, which is not free: it makes the truck feel less planted in a hard turn and worsens rollover risk at the margin. A suspension lift changes driveshaft and CV joint angles, which can mean a diff drop bracket, longer brake lines or a driveshaft carrier bearing to do properly rather than just tall. And a lift changes nothing about the number printed on the tire placard: the payload figure a vehicle was certified with does not move because the truck sits three inches higher, so a lifted truck's actual carrying capacity is exactly what it always was, just easier to forget about.