| abstract |
A tire tread having both suitable skid resistance and hysteresis properties comprises an elastomeric tetrapolymer of ethylene an .alpha.-olefin a nonconjugated diene and at least one sterically hindering mono-olefin monomer consisting of a norbornene compound of the formula: in which R1, R2, R3, R4, R5, R6, R7, R8 represent hydrogen halogen an aliphatic cycloaliphatic or aromatic halogenated or unhalogenated hydrocarbon radical; the elastomeric tetrapolymer contains from about 3% to about 30% by weight of the sterically hindering mono-olefin monomer. |