Indiana Truck Mud Flap Law

What Indiana makes you run

Indiana sets no specific mud-flap or splash-guard dimension in state law; NTEA lists it among the few states with no mudflap statute, so there's no Indiana width or clearance number to measure against. Federal 393.86 still applies to interstate rigs, and a bare rear tire throwing heavy spray can draw a general equipment or unsafe-vehicle look. The real trap is the state line: run compliant flaps anyway, because Illinois, Ohio, and Michigan all get stricter the moment you cross.

Coverage and clearance

• Required: No specific statute
• Coverage: No state tread-coverage rule. Federal 49 CFR 393.86 still requires full-tread-width flaps on interstate CMVs whose rear tires aren't covered by fenders or body, but there is no separate Indiana requirement.
• Ground clearance: No set clearance. Indiana has no specific state mud-flap or splash-guard statute setting a ground-clearance number.
• Fine: No state mud-flap penalty. Any citation would come under general vehicle-equipment or unsafe-vehicle enforcement, or the federal rule for interstate carriers, not an Indiana mud-flap statute.

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