Are studded tires legal in Arizona?

Yes, within a season. Arizona allows studded tires from October 1 through May 1. A.R.S. 28-958 reads: "3. From October 1 to May 1 pneumatic tires containing metal type studs of tungsten carbide or other suitable material that are inserted or constructed in a manner so that the number of studs or the percentage of metal in contact with the roadway does not exceed three per cent of the total tire area in contact with the roadway under any conditions."

From October 1. For the 2026-27 season that is Thursday, October 1, 2026, and the window runs through Saturday, May 1, 2027.

May 1 is the last day of the window, which for 2026-27 is Saturday, May 1, 2027.

Studs may not exceed 3 percent of the tire area in contact with the roadway. ADOT states the same window in plain words.

ADOT tells drivers to use snow tires, chains or studded tires when they are recommended or required on snowy, icy roads. The statute allows tire chains of reasonable proportions when needed for safety. No named statewide chain law was found on ADOT's page. The statute reads: "Use snow tires, chains or studded tires as recommended, required or both on snowy, icy roads."

California, November 1 through April 30; Nevada, October 1 through April 30; Utah, October 15 through March 31; Colorado, no seasonal dates; New Mexico, no seasonal dates. Each state's page quotes its own statute.