Tires Comprising Rubber Compounds that Comprise Propylene-a-Olefin-Diene Polymers

A method comprising:

• producing a master batch at a first temperature, the master batch comprising:
• about 5 phr to about 50 phr of a propylene-α-olefm-(optional diene) PE(D)M polymer that comprises about 65 wt % to about 99.5 wt % propylene, about 0.5 wt % to about 35 wt % α-olefin that is not propylene, and 0 wt % to about 20 wt % diene, said wt % based on the weight of the PE(D)M polymer, and
• about 50 parts per hundred parts rubber (phr) to about 95 phr of a rubber that comprises one selected from the group consisting of the halogenated isobutylene-based rubber is selected from the group consisting of:
• natural rubber, polyisoprene rubber, poly(styrene-co-butadiene) rubber, polybutadiene rubber, poly(isoprene-co-butadiene) rubber, styrene-isoprene-butadiene rubber, butyl rubber, star branched butyl rubber, isobutylene-isoprene rubber, poly(isobutylene-co-alkylstyrene), a halogenated isobutylene-based rubber, polychloroprene rubber, nitrile rubber, and any combination thereof;
• wherein the rubber and the PE(D)M polymer cumulatively are 100 phr;
• and
• mixing a curative and/or a crosslinking agent into the master batch at a second temperature that is lower than the first temperature.