Washington · Revised Code of Washington — Title 46, Motor Vehicles
RCW Title 46 § 46.37.420: Tires—Restrictions
What this law says, in plain English
Vehicles on public highways must have pneumatic rubber tires. Tires cannot have protruding blocks, flanges, cleats, or spikes, except tire chains, alternative traction devices, or metal studs are permitted during snow/ice conditions. Metal studs are prohibited April 1–November 1, with exceptions for retractable studs and certain vehicles.
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