I was told they're illegal, except for this:
http://codes.ohio.gov/orc/5589.081
5589.081 Studded tires - prohibited acts.
(A) For purposes of this section, "studded tire" means any tire designed for use on a vehicle and equipped with metal studs or studs of wear-resisting material that project beyond the tread of the traction surface of the tire; and "motor vehicle," "street or highway," "public safety vehicle," and "school bus" have the same meanings as given those terms in section 4511.01 of the Revised Code.
(B)
(1) Except as provided in division (B)(2) of this section, no person shall operate any motor vehicle, other than a public safety vehicle or school bus, that is equipped with studded tires on any street or highway in this state, except during the period extending from the first day of November of each year through the fifteenth day of April of the succeeding year.
(2) A person may operate a motor vehicle that is equipped with retractable studded tires with the studs retracted at any time of the year, but shall operate the motor vehicle with the studs extended only as provided in division (B)(1) of this section.
© This section does not apply to the use of tire chains when there is snow or ice on the streets or highways where such chains are being used, or the immediate vicinity thereof.
Effective Date: 03-12-1975; 2008 SB44 08-22-2008