Are studded tires legal in Utah?

Yes, within a season. Utah allows studded tires from October 15 through March 31. Utah Code 41-6a-1636 reads: "(a) a tire with protuberances consisting of tungsten carbide studs on a vehicle if the studs: (i) are only used during the winter periods of October 15 through December 31 and January 1 through March 31 of each year;"

From October 15. For the 2026-27 season that is Thursday, October 15, 2026, and the window runs through Wednesday, March 31, 2027.

March 31 is the last day of the window, which for 2026-27 is Wednesday, March 31, 2027.

Studs may not project more than 0.050 inch beyond the tread. Studs may not be used on vehicles with a gross vehicle weight rating over 9,000 pounds unless the vehicle is an emergency vehicle or school bus.

During severe winter weather UDOT can require traction equipment in set locations, sometimes up to 24 hours before a storm. Four wheel and all wheel drive vehicles need M+S or three peak mountain snowflake tires or devices on two drive tires; two wheel drive cars need three peak mountain snowflake tires or devices on all drive tires. The Cottonwood Canyons are a stricter Class 3 area requiring 5/32 inch tread. The statute reads: "During severe winter weather, Utah drivers must use traction devices on their vehicles in certain locations throughout the state."

UDOT lists chains, cables, snow socks and studs as traction devices that satisfy the traction law.

Idaho, October 1 through April 30; Wyoming, no seasonal dates; Colorado, no seasonal dates; New Mexico, no seasonal dates; Arizona, October 1 through May 1; Nevada, October 1 through April 30. Each state's page quotes its own statute.