The X-Bridge technology is specially designed to enable fast, smooth & precise shifts thanks to the outer plates. Compatible with all 11-speed road/MTB systems. The X-Bridge is a new outer plate configured with precisely articulated angles for quicker & smoother gear shifting & quieter riding. Light weight shorter length pins combine with high-grade materials to reduce weight. With unique stretch-proof treatment, the durability has been effectively enhanced by reducing the attrition between inner plates & pin. Because of this, chain life has been significantly enhanced.