Tyres for wet rock, and what the law says about studs
Virginia grip is wet grip. The trails open in April and run to early January, and the forest closes its largest OHV system from the first Monday in January through March precisely because of freezing and thawing. Anything you drive here in spring or autumn is driving on soaked clay and slick rock.
The law is short. Section 46.2-1044 bans any stud or cleat projecting beyond the tread, then permits chains when snow or ice would make a vehicle slide, and permits studded tires only on vehicles at or under 10,000 pounds gross, projecting no more than a sixteenth of an inch, covering no more than three percent of the traction surface, and only between October 15 and April 15. There is no traction law to comply with beyond that.