10.32.030   Tires—Permits required for farm machinery.
   A.   Every solid rubber tire on a vehicle shall have rubber on its entire traction surface at least one inch thick above the edge of the flange of the entire periphery.
   B.   No person shall operate or move on any street any motor vehicle, trailer or semitrailer having any metal tire in contact with the street.
   C.   No tire on a vehicle moved on a street shall have on its periphery any block, stud, flange, cleat or spike or any other protuberance of any material other than rubber which projects beyond the tread of the traction surface of the tire, except that it is permissible to use farm machinery with tires having protuberances which will not injure the street, and except also that it is permissible to use tire chains of reasonable proportions or pneumatic tires, the traction surfaces of which have been embedded with material such as wood, wire, plastic or metal, which shall in no instance protrude more than one-sixteenth of an inch beyond the tire tread, upon any vehicle when required for safety because of snow, ice or other conditions tending to cause a vehicle to skid.
   The use of pneumatic tires embedded as provided in this subsection shall be permitted only between the first day of October and the last day of May of each year, except that one such tire may be used for a spare in case of tire failure.
   D.   The municipality may, in its discretion, issue special permits authorizing the operation upon a street of traction engines or tractors having movable tracks with transverse corrugations upon the periphery of such movable tracks or farm tractors or other farm machinery, the operation of which upon the street would otherwise be prohibited.
(Ord. 321 Art. 11 § 3, 1974).