Wyoming Studded Tire Law
No seasonal limit. Wyoming lets you run metal studs any month of the year (Wyo. Stat. 31-5-956), and there's no GVW cap, so a loaded truck can run studs year-round — the studs just have to be a type approved by the state and not materially injure the pavement. But studs are not chains: when Wyoming's chain law hits Level 1 or Level 2 on I-80, you still have to chain up.
Running studs in Wyoming
No seasonal limit. Wyoming lets you run metal studs any month of the year (Wyo. Stat. 31-5-956), and there's no GVW cap, so a loaded truck can run studs year-round — the studs just have to be a type approved by the state and not materially injure the pavement. But studs are not chains: when Wyoming's chain law hits Level 1 or Level 2 on I-80, you still have to chain up.
The window and winter-tire rules
- Season: No seasonal limit. Metal studs are legal in any month (Wyo. Stat. 31-5-956), provided they are a type approved by the state transportation superintendent and don't materially injure the road surface.
- No statewide winter-tire (M+S/3PMSF) mandate, but Wyoming runs an aggressive chain law on I-80 and other corridors (Level 1 and Level 2 restrictions and closures). Studs are not chains or an approved traction device and never satisfy a chain-law level — see the Wyoming chain-law page. Truck weight cap: none, studs legal for trucks year-round.
Wyoming Studded Tire FAQ
Are studded tires legal in Wyoming?
When can you use studded tires in Wyoming?
What is the fine for illegal studded tires in Wyoming?
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 Traffic laws change and this can be out of date, so always confirm the current statute and obey posted signs before you rely on it.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://codes.findlaw.com/wy/title-31-motor-vehicles/wy-st-sect-31-5-956.html. See our Terms & Disclaimer.
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