Ohio Truck Mud Flap Law

What Ohio makes you run

Ohio requires flaps or wheel protectors on the rearmost wheels of commercial rigs over 3 tons loaded, unless a fender or body covers those wheels to the axle centerline (ORC 5577.11). Flaps must be at least as wide as the tires, and the ground gap can't exceed one third of the distance from the rear axle center to the flap. The fine caps at $25 (5577.99). A flap legal under a fixed 8-inch rule can still fail Ohio's proportion test.

Coverage and clearance

• Required: Yes
• Coverage: At least as wide as the tires being protected. Rear wheels not covered on top by fenders or body must be covered to at least the centerline of the rearmost axle; if fenders or body already do that job, no separate flaps are required.
• Ground clearance: Proportional rule: ground clearance no more than one third of the distance from the center of the rearmost axle to the center of the flaps, under any conditions of loading.
• Fine: Fine of not more than $25 (ORC 5577.99(E)); a minor, correctable equipment violation.

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