Alaska Tire Regulations

It is unlawful to operate a motor vehicle with studded tires or tires with chains attached on a paved highway or road from May 1 through September 15, inclusive, north of 60 North Latitude and from April 15 through September 30, inclusive, south of 60 North Latitude, except that at any latitude on a paved portion of the Sterling Highway a person may not operate a motor vehicle with studded tires or tires with chains attached from May 1 through September 15, inclusive. The commissioner of public safety shall by emergency order provide for additional lawful operating periods based on unusual seasonal or weather conditions. Upon application, a special individual traction permit may be issued by the Department of Administration allowing the operation of a motor vehicle with studded tires or chains at any time at the discretion of the vehicle owner. The fee for the special individual permit is one-third of the biennial registration fee applicable to that class of vehicle. The department may provide an appropriate sticker or other device identifying the vehicle to which the permit applies. "Studded tire" means a tire with metal studs or spikes imbedded in the periphery of the tire surface, and protruding not more than one-fourth inch from the tire surface.

No person may drive a vehicle with a tire in unsafe operating condition or with a tread depth of less than 2/30 of an inch measured in two adjacent tread grooves at three equally spaced intervals around the circumference of the tire.

http://dnr.alaska.gov/ag/Index/Chapter25.pdf