Yes, studded tires are legal in Colorado but face strict seasonal and regional restrictions enforced by the Colorado Department of Transportation (CDOT) and local jurisdictions. Use is permitted only from November 1 to April 30 on designated routes, with additional bans in mountain areas like Vail and Aspen to protect road surfaces. Violations incur fines up to $100, and non-compliance may void insurance coverage during accidents.
Key Regulations for Studded Tires in Colorado
- Seasonal Window: Operation is restricted to November 1–April 30 statewide, aligning with CDOT’s winter traction device protocols.
- Designated Routes: Permitted only on roads marked with “Traction Law” signs; prohibited in high-altitude tourist zones (e.g., I-70 Mountain Corridor) to mitigate pavement damage.
- Stud Specifications: Tires must comply with federal DOT standards (≤ 6/32” stud protrusion) and carry a minimum tread depth of 6/32”. Local ordinances in ski towns may impose additional bans.
CDOT’s 2026 compliance updates mandate electronic signage to enforce real-time restrictions, and law enforcement prioritizes enforcement in avalanche-prone corridors. Commercial vehicles face heightened scrutiny under the state’s Chain Law (Code of Colorado Regulations 3 CCR 702-14), which may supersede studded tire allowances during severe weather. Always verify local municipal codes, as some Front Range cities (e.g., Boulder) impose year-round bans.