Hey guys here in my part of Indiana all I would look for is the DOT on the side of the tire. So Steve you should be safe. I think the warnings on the tires are more to cover the tire company in case you get caught out in the rain. Or if you run the tire all of the time and wear them out quickly. Heres the law from Indiana:


IC 9-19-18-1
Solid rubber tires
Sec. 1. A solid tire made of rubber on a vehicle must have rubber on the tire's entire traction surface at least one (1) inch thick above the edge of the flange of the entire periphery.
As added by P.L.2-1991, SEC.7.

<A name=IC9-19-18-2>IC 9-19-18-2
Metal tires
Sec. 2. A person may not operate or move on a highway a motor vehicle, trailer, or semitrailer having a metal tire in contact with the roadway.
As added by P.L.2-1991, SEC.7.

<A name=IC9-19-18-3>IC 9-19-18-3
Protuberances on tires
Sec. 3. (a) Except as provided in subsections (b) through (d), a tire on a vehicle moved on a highway may not have on the tire's periphery a block, stud, 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.
(b) Implements of agriculture may use tires having protuberances that will not injure the highway.
(c) Tire chains of reasonable proportions may be used upon a vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid.
(d) From October 1 to the following May 1, a vehicle may use tires in which have been inserted ice grips or tire studs of wear-resisting material, installed in a manner that provides resiliency upon contact with the road, with projections that do not exceed three thirty-seconds (3/32) of an inch beyond the tread of the traction surface of the tire, and constructed to prevent any appreciable damage to the road surface.
As added by P.L.2-1991, SEC.7. Amended by P.L.210-2005, SEC.30.

<A name=IC9-19-18-4>IC 9-19-18-4
Special permits
Sec. 4. The Indiana department of transportation and local authorities in their respective jurisdictions may in their discretion issue special permits authorizing the operation upon a highway of:
(1) traction engines;
(2) tractors having movable tracks with transverse corrugations upon the periphery of movable tracks; or
(3) farm tractors or implements of agriculture designed to be operated primarily in a farm field or on farm premises;
the operation of which upon a highway would otherwise be prohibited under this chapter. As added by P.L.2-1991, SEC.7. Amended by P.L.210-2005, SEC.31.


<A name=IC9-19-18-5>IC 9-19-18-5
United States Department of Transportation regulations; classification of violations
Sec. 5. (a) This section does not apply to a person who owns or operates a vehicle or combination of vehicles that:
(1) contains parts and accessories; and
(2) is equipped;
as required under regulations of the United States Department of Transportation.
(b) A person who violates this chapter commits a Class C infraction.
As added by P.L.2-1991, SEC.7.

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