The XCX family of retention systems was designed with the XC racer and trail rider in mind. As such, it's lightweight, has a lot of features, and only comes in black. The CX seat tube mount version of the guide offers the greatest amount of chainline adjustment via an easy to adjust cam that also adapts the guide to different seat tube sizes. Cyclocross crankset specific chainline, 39.5mm-42.5mm
Shim-cams included for28.6, 31.8 and 34.9mm seat tube diameters.