Nevada Studded Tire Season Runs October 1 to April 30

The controlling section is NRS 484D.510, which starts from a flat prohibition: no motor vehicle may run tires carrying "any block, flange, cleat, ridge, bead or any other protuberance of metal or wood" that projects beyond the traction surface. Studded snow tires are lawful only because subsection 2 carves them out, and the carve-out comes with two conditions rather than one. The studs must be tungsten carbide or other suitable material, and the tire must be built so that under no conditions does the metal in contact with the roadway exceed 3 percent of the total tire area touching the road. Nevada writes that limit as a percentage of the contact patch, not as a stud count per tire, so the compliance question is how the tire was manufactured, not how many studs an installer chose to fit.

The seasonal half of the rule is the part drivers get wrong. Conventional studded tires "may only be used between October 1 and April 30." That is a use restriction rather than a sale or possession restriction, so tires that were legal on April 30 have to come off the vehicle before it is driven on May 1. Nevada then adds a paragraph most states do not have. Under NRS 484D.510(2)(d), pneumatic tires with retractable tungsten carbide studs may be used at any time of the year, and only the act of engaging or extending the studs is confined to October 1 through April 30. A Reno or Carson City driver running retractable studs therefore keeps one set of tires on the car in July, provided the studs stay retracted.

Two further exceptions sit alongside the studs. Subsection 2(b) permits pneumatic tires with wire embedded in them not exceeding 0.075 inch in diameter, so long as metal contact stays at or below 5 percent of the contact area, with an allowance of up to 20 percent during the first 1,000 miles of use. That wire allowance carries no calendar limit at all. Subsection 2(a) exempts tire chains and traction devices approved by the Director of the Department of Motor Vehicles, subsection 2(e) exempts vehicles working on unimproved roadways during highway construction or repair, and subsection 2(f) exempts traction engines and tractors operating under a permit from the Department of Transportation on state highways or from the city or county governing body on local roads.

Studs are not what Nevada requires when a pass is snowed in. Under NRS 484D.515 it is unlawful to drive without traction devices, tire chains or snow tires on a street or highway under icy or snowy conditions when the highway is marked or posted with signs requiring them, and that duty reaches emergency vehicles as well. NRS 484D.520 then splits the requirement by weight: a vehicle or combination at 10,000 pounds gross weight or less may satisfy a posted requirement with traction devices, tire chains or snow tires, while anything over 10,000 pounds must have tire chains specifically. Where signs demand chains on everything except four-wheel drive vehicles carrying snow tires on all wheels, every other vehicle must be chained. NRS 484D.525 requires the chains or devices to go on at least two driving wheels, plus the braking wheels of any trailing vehicle that has or must have brakes.

The DMV has defined those terms by regulation, so the equipment in the trunk has to meet a spec. NAC 484D.220 says a tire chain must be metal or plastic and consist of two circular loops, one on each side of the tire, joined across the tread by not fewer than nine evenly spaced chains, cables or straps. NAC 484D.225 requires a traction device to be metal, plastic or a combination, delivering traction through arms connected to a central support ring attached to the wheel, unless the Director approves a nonconforming design. NAC 484D.230 sets the snow tire standard: a minimum tread depth of 3/16 inch measured in any two adjacent grooves, a discontinuous tread pattern whose shoulder lugs extend at least 1/2 inch beyond the rest of the tread, and a sidewall marking of "mud and snow" or an M and S abbreviation on passenger car tires made on or after January 1, 1976 and light truck tires made on or after March 1, 1981.

Nevada has no periodic safety inspection that would catch out-of-season studs, so enforcement is entirely roadside. NRS 484D.560 lets a peace officer or a Department of Motor Vehicles inspector who has reasonable cause to believe a vehicle is not equipped as chapter 484D requires stop the driver, inspect the equipment and run appropriate tests. If the vehicle fails, the officer may issue a citation or notice of violation and require the owner to produce satisfactory evidence in court or at the officer’s office that the equipment has been brought into compliance, which is Nevada’s correctable violation route. The DMV may also operate inspection centers at branch offices, but those are limited to tires and brakes on vehicles under 10,000 pounds declared gross weight that were built more than two years before the inspection and are being registered in Nevada.

Because NRS 484D.510 does not declare its own penalty, NRS 484A.900 supplies one: doing anything forbidden by chapters 484A to 484E of NRS is a civil infraction unless a particular section says otherwise. Under NRS 484A.7043 a person found to have committed a civil infraction pays a civil penalty of not more than $500 per violation, plus the administrative assessments that would apply to a misdemeanor fine under NRS 176.059, 176.0611, 176.0613 and 176.0623. The citation itself must state that a civil infraction is not a criminal offense, so there is no jail exposure and no misdemeanor conviction. Leaving the penalty unpaid adds a collection fee of up to $100 where the delinquency is under $2,000, and the city or county may hand the debt to a licensed collection agency under NRS 484A.7047. Driving past a posted chain control sign without chains or snow tires is a separate violation of NRS 484D.515 and is penalized the same way.