S.D. Codified Laws § 32-25-6.2 (2026)
No person may drive any vehicle equipped with solid rubber or cushion tires at a speed greater than a maximum of ten miles per hour. A violation of this section is a Class 2 misdemeanor.
Source: SL 1970, ch 175 , § 14, § 4; SL 1989, ch 255 , § 130.