The M6100 chain provides smooth shifting and enhanced chain retention thanks to an extended portion of the inner plate a Extended inner plate improves chain engagement and retention a Shorter shift times and less pedaling shock a Non-reusable quick link included a Optimized to work with HYPERGLIDE+ cassette sprockets and DYNAMIC CHAIN ENGAGEMENT+ chainrings a Compatible with 12-speed drivetrain a E-Bike Compatible: yes a Links: 126 links a Quick Link Included: yes a Roller Link Plate: brown a Pin Link Plate: gray