This is a 1973 Lola Formula Ford that competes in the Club Ford (CF) class.
In the US, FF cars use a spec slick tyre. In Europe it's a spec grooved tyre.
I thought the tyres might be wrapped in cellophane so they wouldn't pick up dirt in the paddock. But the driver told me that wrapping the tyres was an old go-carting trick to keep the "oils" from leaching out of the rubber.