Whether it's the weekly group ride or the "A" race of your season, don't let a dropped chain leave you panicked, greasy, and desperately chasing. The new ARg chainguide offers 25 grams of vital insurance for every 1x all-road or gravel bike. With its compact design, the ARg is so lightweight and quiet that you'll barely even notice it's there.Streamlined aluminum upper guide with 8mm of chainline adjustmentFeatures a nitrile rubber o-ring to eliminate noise Typically fits 38-54t 1x chainrings, but can vary based on braze-on location on frame (Oval rings reduce range by approximately 2 teeth (36-52t in most cases)Designed to be compatible with 43-51mm chainlines, covering all modern gravel and road 1x systems MRP ARg Chainguide Chain Retention System UPC: 702430223454