As of Tuesday, April 22, 2014
Idaho drivers’ use of studded tires ends next Wednesday, April 30. Driving with studded tires outside of that time frame is a non-moving equipment violation with a fine of $67, according to the Idaho State Police.
In neighboring Oregon and Washington, studded tire use ended March 31. Users in Montana have until May 31.
Idaho’s law was amended in 2002 to allow studded tires until April 30. Idaho law in 2003 also mandated lightweight studs because the heavier studs were found to cause too much wear to the highway surface, according to the Idaho Transportation Department.