The GCX is the perfect guide for gravel and cyclocross riders and racers wanting a bulletproof, single-ring front drivetrain. Newly redesigned to be lighter, stiffer, quieter, & maintenance-friendly.FeaturesPop-UP - The âÂÂPop-Upâ feature allows for tool-free chain access - simplifying installation and drivetrain maintenance. The guide pops up and snaps shut with satisfying and secure clicks.SpecificationMaterial: AlloyChainring Range: 38-46tDrivetrain Compatibility: Internally shaped to accommodate 44-51mm chain lines, covering all modern gravel and road 1x systemsMounting Options: Braze-on mountWeight: 29g