Box Two Prime 9 chain delivers exceptional durability and performance. It’s fully compatible with wide/narrow chainrings and features hardened solid pins for long-lasting strength. A nickel-plated finish, including the connecting link, enhances corrosion resistance for reliable use in tough conditions. The chain is available in both 126L and 144L lengths, each offering a salt spray life of 45 hours. The 144L option is ideal for cargo and long wheelbase bikes. For riders seeking maximum protection from the elements, the Extended Performance Treatment (XPT) version offers an impressive 650-hour salt spray life, making it well-suited for the harshest environments. They also work well with BMX 3/32" Chainrings and Cogs. SUPPORT MATERIAL 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?