In response to repeated customer demands, we have a set of front left A-arms now available for the Traxxas Summit. Our front right A-arms for the Traxxas Revo (reference RPM #80212 & #80215) are already compatible with the Summit but due to the extended T-Lock differential on the left side, our Revo front left A-arms would not fit. That is no longer an issue with these A-arms. With a revamped cross-brace to clear the T-Lock differential, our Summit front left A-arms will allow full RPM Summit & Revo Black Front Left A-arms suspension travel and significantly improve overall suspension durability. RPM front A-arms for the Traxxas Summit are molded from our indestructible blend of engineering grade nylons for unmatched performance and durability. If you're tired of replacing broken stock parts over and over, give RPM a try.