Components of rubber tires
Components of rubber tires means any piece or part used in the manufacture of rubber tires that becomes an integral portion of the rubber tire when manufacture is complete and includes mixed rubber compounds, sidewalls, tread, tire beads, and liners. Other components often associated with rubber tires such as wheels, valve stems, tire bladders and inner tubes are not considered components of rubber tires for the purposes of these standards. Tire cord and puncture sealant, although components of rubber tires, are considered as separate affected sources in these standards and are defined separately.
Source
40 CFR § 63.6015
Scoping language
Terms used in this subpart are defined in the Clean Air Act and in 63.2, the General Provisions. The following are additional definitions of terms used in this subpart: