Lifted 4x4's, Trucks & Jeeps Lift Laws Map























Trying to understand the patch work of lift laws by state can be confusing.

Of course, Illinois has the trifecta of lift laws for lifted trucks.

There is a suspension lift limit, a maximum frame height limit and a bumper height limit.

However, suspension lift kits are allowed in Illinois as well as aftermarket wheels and tires and bumpers.

A lot of the ultimate rides in Illinois have passed through the CPW Truck Stuff shop for a lift kit or other modification. 


The Illinois Compiled Statutes (ICS) define the street legal lift laws for the state of Illinois


Vehicle dimensions in Illinois are limited to a width of 102 inches, a height of 13 feet 6 inches, and a single vehicle length of 42 feet


The State Illinois requires that all tires be in safe condition. Tires must not have any exposed cords or bulges. There is a minimum tire tread depth of 1/16 inch .

Tires are allowed to be grooved.

Just not deeper than the original tread depth. 


There are no specific laws regulating wheels in the Illinois statutes


Vehicles driven in Illinois are required to have brakes on all four wheels. The brakes must be capable of stopping the vehicle from a speed of 20 mph within 30 feet.

A secondary mechanical parking brake is also required. 


Illinois does not have any specific steering related laws

Custom Truck & Jeep Builders


A vehicle’s suspension cannot be modified so that it causes the vehicle’s bumper to be raised or lowered more than 3 inches


The maximum vehicle frame height in Illinois depends on the vehicle’s GVWR.

The lowest portion of the vehicle’s body must not be more than 4 inches above the frame. (Under 4,500 – 24 inches max, 4,501 to 7,500 – 26 inches max, 7,501 to 10,000 – 28 inches max) 


Front and rear bumpers are required in Illinois. Bumper heights are limited according to the vehicle’s GVWR


Mud flaps are required on pickup trucks in Illinois


Additionally vehicles in Illinois are allowed to have auxiliary lights added to headlights and tail lights.

Conversely, no more than 4 front lights can be active while driving. 


All vehicles are required to have windshields and windshield wipers in Illinois


Mufflers are required on all vehicles in Illinois. Exhaust cutouts and bypasses are prohibited. 


Ultimately, It is unclear whether Illinois has any engine swap or engine performance modification rules. 


Several counties in Illinois, including Cook County, currently require emissions testing.