South Dakota Truck Mud Flap Law
South Dakota pulled its fender rule in 1978 (old SDCL 32-15-19, repealed) and never replaced it, so there's no state width or clearance number to hit. Older '42-state' charts still list South Dakota as regulated; the current code doesn't. A missing flap isn't out-of-service, and CVSA's 2025 note says rubber brushing a tire isn't either. Minnesota next door does enforce 9 inches (Minn. Stat. 169.733), and you're judged where you're stopped.
A detail here is flagged medium confidence — confirm with the state statute before you rely on it.
What South Dakota makes you run
South Dakota pulled its fender rule in 1978 (old SDCL 32-15-19, repealed) and never replaced it, so there's no state width or clearance number to hit. Older '42-state' charts still list South Dakota as regulated; the current code doesn't. A missing flap isn't out-of-service, and CVSA's 2025 note says rubber brushing a tire isn't either. Minnesota next door does enforce 9 inches (Minn. Stat. 169.733), and you're judged where you're stopped.
Coverage and clearance
- Required: No specific statute
- Coverage: No set width. No current South Dakota statute states a tread-coverage rule.
- Ground clearance: No set clearance. South Dakota's old fender/splash section (SDCL 32-15-19) was repealed in 1978, and no replacement sets a ground-clearance number.
- Fine: No dedicated mud-flap fine. A general equipment defect is possible if a bare tire slings rock, usually a low-dollar correctable ticket, but there is no flap-specific charge.
South Dakota Mud Flap FAQ
Are mud flaps required on trucks in South Dakota?
How low can mud flaps hang in South Dakota?
What is the mud-flap fine in South Dakota?
Reference information for planning, not legal advice. Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it. Last reviewed July 2026. Source: https://sdlegislature.gov/Statutes/32-15. See our Terms & Disclaimer.
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