Oregon Revised Statutes Oregon Vehicle Code § 815.145

(a) Has an unloaded weight of 6,500 pounds or less;

(b) Is equipped and operated to provide power to both front and rear wheels;

(c) Is carrying chains as defined in ORS 815.045;

(d) Is equipped with tires, on all wheels, that are vehicle traction tires as defined in ORS 815.045;

(e) Is not towing another vehicle other than as may be necessary to remove disabled vehicles from the roadway; and

(f) Is not being operated in a manner or under conditions where the vehicle loses traction while stopping, cornering or moving.