May tires be filled with materials other than air (e.g., silicone, polyurethane)?
Section § 393.75: Tires.
Guidance Q&AQuestion 3: May tires be filled with materials other than air (e.g., silicone, polyurethane)?
Guidance: Section 393.75 does not prohibit the use of tires filled with material other than air. However, § 393.3 may prohibit the use...