Despite its normal looks, the new PC-X01 Eagle Chain is anything but. Specifically engineered for the Eagle 12 Speed Groupsets, the PC-X01 Eagle is one of the biggest contributors to the groupsets smooth, precise running & high durability. Each link in the PC-X01 Eagle Chain features a smooth radius with no sharp edges or chamfers to yield a significant reduction in noise, friction, & wear on chainrings & cassette cogs. This design also allows for a flatter plat which boosts overall strength. Hard Chrome treatment technology boosts the PC-X01 Chains optimal performance life. Description by Mark, Rutland Cycling Web Team.