The new Quantum ST is the successor to the popular Quantum model. Aimed and developed for the large group of serious sport-touring riders who demand a perfect mix between touring comfort and sports performance. The new Quantum ST is the perfect companion for these riders. Using technology from the top of the range RX-7 GP race helmet in combination with a brand new outer shell, a new dimension in sport-touring performance was achieved. The new ST shell offers significantly more space around the chin area for even more comfort and ventilation during those long runs.