Engineered with precision and performance in mind, the shimano Dura-Ace HG901-11 chain sets a new standard for smooth and efficient shifting on 11-speed drivetrains. Featuring a comprehensive Sil-Tec treatment on its plates and rollers, it boasts enhanced durability and efficiency. The chain's asymmetric design ensures seamless front and rear shifts, while minimizing drivetrain noise for a quieter ride. Designed for compatibility with e-bikes, it offers versatility for various cycling applications. HG-X11 features a special asymmetric plate design for 11-speed drivetrains Ensures smooth and noise-free rear drive Preserves chain security at cross chainline Facilitates smooth and reliable shifting Sil-Tec treatment Hollow pin construction Weight Approx. 250 g