Rollout is the Mini-Con partner of Overload. With uncanny precision, he is able to extinguish a fire within a five-mile radius. Unlike other partner Mini-Cons, Rollout possesses an upgraded version of the ancient Autobot Headmaster technology and is permanently integrated into his partner's physiology. Forming the head and central core of Overload, the two Transformers combine to form one of the most powerful Autobot warriors.
Bio and image taken from the 2003 Fleer Transformers Armada Trading Card set.