Federal & State Regulations | CMV parts and maintenance - Wisconsin

State Info

Wisconsin has adopted Part 393 of the Federal Motor Carrier Safety Regulations (FMCSRs), with the exception of 393.42 in some instances.

Part 393 applies to any self-propelled or towed motor vehicle used on a highway in intrastate commerce when the vehicle has a gross vehicle weight rating, gross combination weight rating, gross vehicle weight, or gross combination weight of 10,001 pounds or more, or is of any size transporting a placardable amount of hazardous materials.

Brakes	Section 393.42 does not apply to vehicles placed in operation in common, contract, or private carriage prior to June 1, 1987.
First Aid Kit	Not required
Mudflaps	Trucks and semitrailers used in intercity movement must be equipped with rear fenders or mudguards capable of restricting the splashing of water, mud, and other materials which may be thrown by the rear wheels. Fenders and mudguards must be at least as wide as the tire or multiple tires they are protecting, and extend rearward and downward so that the fender or mudguard under any condition of loading of the vehicle has a ground clearance of not more than ¹/₃ the horizontal distance from the center of the rearmost axle to the fender or mudguard. Exception: Mudflaps are not required on vehicles or semitrailers equipped with dump bodies.
Tires	Studded tires - No tire may have any block, stud, flange, cleat, spike, or any other protuberance of any material other than rubber projecting beyond the tread surface of the tire.
Tires	Tire chains - Tire chains of reasonable proportions may be used on any vehicle when required for safety because of snow, ice, or other conditions tending to cause a vehicle to skid.

['CMV Parts and Maintenance']

['Parts and Accessories - Motor Carrier', 'Tires']

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