The Box One Prime 9 chain is protected by a dual coating process: nickel plating for corrosion resistance, topped with a Diamond-Like Carbon (DLC) layer that enhances hardness, wear resistance, and slickness. Featuring chamfered shifting edges, solid plates, and pins, it’s engineered for secure engagement with wide/narrow chainrings and built to endure the rigors of modern riding. They also work well with BMX 3/32" Chainrings and Cogs. IMPORTANT NOTES Prime 9 Technology™ View Prime 9 Drivetrain Compatibility Manual How is the Ebike variant different? View Prime 9 Comparison Chart View Prime 9 E-Bike Comparison Chart Why Prime 9?