In applications where 1x drivetrains rule, rock solid reliability and performance is an absolute requirement. X-SYNC road chainrings deliver on both while offering quiet operation and chain security. Their four-bolt spider-based design requires a single tool to install and makes changing rings for different courses or events simple. And they will go the distance. The advanced, long-wearing design of the patented X-SYNC teeth improves chain retention throughout the life of the ring to deliver consistent performance season after season New In Box .