Idaho Street Legal Laws

Indiana Street Legal Laws

Illinois Lift Laws and Vehicle Equipment Laws

Illinois completes the triple-crown of suspension modification restrictions: There is a suspension lift limit, a maximum frame height limit and a bumper height limit. Although restricted, suspension lift kits are allowed in Illionis, as are aftermarket wheels and tires, performance shocks, aftermarket bumpers, and grille guards.

Governing Laws


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

ICS 625-5

Vehicle Dimensions


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.

ICS 625-5-15-102
ICS 625-5-15-103
ICS 625-5-15-107

Tire Restrictions


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 any deeper than the original tread depth.

ICS 625-5-12-405
ICS 625-5-12-402

Wheel Restrictions


There are no laws specifically related to wheels found in the Illinois statutes.

Braking Requirements


Vehicles driven in Illinois are required to have brakes on all 4 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.

ICS 625-5-12-301

Steering Laws


Illinois does not have any specific steering related laws.

Suspension Laws


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

ICS 625-5-12-607

Frame Requirements


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.

Vehicle GVWR

Max. Frame Height

Under 4,500

24 inches

4,501 to 7,500

26 inches

7,501 to 10,000

28 inches

( Measured to the bottom of the frame. )

ICS 625-5-12-607

Bumper Restrictions


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

Vehicle GVWR

Max. Bumper Height

Under 4,500

Front: 24 inches | Rear: 26 inches

4,501 to 7,500

Front: 27 inches | Rear: 29 inches

7,501 to 9,000

Front: 28 inches | Rear: 30 inches

Over 9,000

Front: 28 inches | Rear: 30 inches

( Measured to the bottom of the bumper. )

ICS 625-5-12-608

Fender Requirements


Mud flaps are required on pickup trucks in Illinois.

ICS 625-5-12-710

Lighting Requirements


In addition to headlights and tail lights, vehicles in Illinois are allowed to have auxiliary lights. When a vehicle is equipped with extra lighting, no more than 4 front lights can be on at one time while driving.



Min. Height

Max. Height


2 min.



Tail lights

2 min.



Spot lights

1 max.



Fog lights




Aux. driving lights

3 max.

12 inches

42 inches

( Measured to the center of the light. )

ICS 625-5-12-201
ICS 625-5-12-207
ICS 625-5-12-211

Window Laws


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

ICS 625-12-501
ICS 625-12-503

Exhaust Requirements


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

ICS 625-12-602

Engine Swap Rules


It is unclear whether or not Illinois has any engine swap or engine performance modification rules.

Emissions Testing


Several counties in Illinois currently require emissions testing.

Recommended Links

Off-Road Parts
Drivetrain Parts
Axle Builder
Crown Race Gears
Polar Cryogenics
King Shocks
King OEM Shocks
King UTV Shocks
Off-Road Race Tires
Beadlock Wheels
Rockwell Axles

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