1.1 This specification covers the general requirements for a radial-ply standard reference test tire. The tire covered by this specification is primarily for use as a reference for tire traction performance evaluations, but may also be used for other e This specification covers the general requirements for a radial-ply standard reference test tire for use as a reference for tire traction performance evaluations and for other evaluations, such as pavement roughness, noise, or other tests that require