Washington’s standards for tire chains, studded tires, and their use and approval can be found in Chapter 204-24 WAC.
What qualifies as traction devices?
The following equipment items are approved for use as traction devices wherever traction devices are required by WSDOT:
• Tire chains (WAC 204-24-020)
• Studded tires (WAC 204-24-030)
• Traction tires –Tires labeled as all–season, all–weather, snow tire or studded (must be labeled M+S or with the mountain/snowflake symbol on the sidewall) qualify so long as they meet the standards for traction devices as set in WAC 204–24–040.
More information on approved traction devices, please visit WAC 204-24-040.
When can I use studded tires?
Studded tires are approved for use from November 1 to March 31. WSDOT determines additional periods in which they can be used.
There is nothing in the law that provides for any special permits or exceptions for driving with studded tires –