The choice depends on the intended use of the vehicle.
A +2″ lift is a compromise for daily driving and light touring (allows for 33″ tires).
A +3″ / +4″ lift works well for expedition touring with a full load (bumpers, winch, 33″-35″ tires).
A +5″ / +6″ lift is an extreme modification for heavy off-road use and large tires (35″-37″), requiring deeper changes to the steering and suspension geometry.
The basis of every kit is heavy-duty lift springs and extended-travel shock absorbers. It is essential to complement the kit with adjustable Panhard rods, eccentric bushings or drop boxes (from 3 inches up), extended sway bar links, and longer brake lines.
Changing the ride height alters the suspension geometry. Simply installing taller springs without correcting angles can worsen stability. To prevent this, adjustable Panhard rods (to center the axles relative to the body) and a Caster Kit (eccentric bushings or corrected control arms) are used to restore factory-like handling.
With a mild +2″ lift, many vehicles can retain their factory components, though a check at maximum suspension articulation is recommended. For lifts of +3″ and higher, replacing Panhard rods with adjustable ones and installing longer steel-braided brake lines is strictly required for safety.
With stock height or a +2″ lift, 32″ or 33″ tires fit (e.g., 285/75 R16).
A +3″ / +4″ lift allows for the safe installation of 33″ and 35″ tires (with appropriate wheel offsets or minor fender trimming).
A +5″ / +6″ lift allows for 35″, 37″, and larger tires, accompanied by necessary fender modifications.
Yes, especially with lifts from +4″ to +6″. Changes in drive shaft operating angles can generate vibrations during driving, sometimes requiring drive shaft carrier bearing spacers, a gearbox drop kit, or double-cardan (cv joint) shafts. When switching to very large tires (35″-37″), changing differential gear ratios is also recommended.
A suspension lift (replacing springs and shock absorbers) genuinely increases ground clearance under the differentials and improves off-road articulation. A body lift involves raising the body itself off the frame using spacers—it does not increase differential ground clearance, but it allows for larger tires and often serves as a complement to a high suspension lift.
Spring stiffness is chosen based on the vehicle’s additional load. For driving without extra equipment, standard versions are chosen. If the vehicle has steel bumpers, a winch, a roof rack, or an expedition drawer system (heavy constant load), Heavy Duty (HD) springs must be selected to prevent the vehicle from sagging under the weight of the equipment.
Formally, any modification changing the factory height of a vehicle should be verified at a vehicle inspection station. In practice, brand-name kits come with certificates, and a properly executed installation of geometry-correcting components allows for a smooth inspection process. However, keep in mind that a taller vehicle has a shifted center of gravity and requires more cautious driving on asphalt.
The working time depends on the vehicle’s technical condition—seized bolts can be a challenge in older examples. In a professional off-road workshop, replacing just the springs and shock absorbers is a matter of a few hours. Installing a full kit along with geometry corrections (Panhard rods, Caster Kit bushings, lines) can take from 1 to 3 working days.
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