Tire Size, Thread Depth, Width and Snow Chains Regulations (USA and Canada)
A. When use is permitted, 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. 2/32 inch is the minimum legal tread depth.
B. A person shall not operate or move on a highway a motor vehicle, trailer or semitrailer having any tire surface in contact with the roadway that is wholly or partly of metal or other hard non resilient material, except a snow tire with metal studs designed to increase traction on ice or snow.
C.66-3-847 No tire on a vehicle moved on a highway shall have on its periphery a block, flange, cleat or spike or any other protuberance of any material other than rubber that projects beyond the tread of the traction surface of the tire. However, it shall be permissible to use farm machinery with tires having protuberances that will not injure the highway and tire chains of reasonable proportions or snow tires with metal studs designed to increase traction on ice or snow upon any vehicle when required for safety because of snow, ice or other conditions tending to cause a vehicle to skid.
D. The state transportation commission and local authorities, in their respective jurisdictions, may, in their discretion, issue special permits authorizing the operation upon a highway of traction engines or tractors having movable tracks with transverse corrugations upon the periphery of the movable tracks or farm tractors or other farm machinery that would otherwise be prohibited under the Motor Vehicle Code [66-1-1 NMSA 1978].
E. A vehicle equipped with solid rubber or cushion tires shall not be permitted upon any highway of this state without special permission from the state transportation commission or the local authority having jurisdiction over the highway affected, and in no event may any such vehicle be operated at a speed in excess of that specified by law.
Below is a list of states and their tire regulations.
Click on the states below for links to the state's guidelines for for tire regulations for commercial vehicles / heavy haul shipping. These regulations are subject to change for each state. If something doesn't look correct, give us a shout and let us know so we can property update the page.