The 1x is a durable, lightweight chainguide. Its “TR” upper guide features dual-material construction with a soft material on the interior walls, allowing it to perform silently. The 1x lets you to focus on going the distance, without interruption. It is the definitive cross-country chainguide. Our new, redesigned upper guide is 26% smaller than the original and now features 7mm of inboard/outboard adjustment, removing the need for spacers in most installations. The new Pop-Up feature allows for tool-free access to the chain, simplifying installation and maintenance. The 1x is the perfect guide for riders and racers wanting a lightweight single-ring front drivetrain for cross-country use. New upper guide that is 26% smaller than the original and co-molded with softer material on the inside to cut chain noise. Redesigned internal shaping for better “rub-mitigation” with super-wide ratio cassettes and wide chainlines. 7mm of inboard/outboard adjustment at the upper guide, making many installations spacer-free. New Pop-Up feature simplifies guide installation and general drivetrain maintenance by allowing for tool-free access to the chain. The front half of the upper guide “pops-up” by hand with upward pressure. Optimized for 28-38t chainrings Compatible with 8-12 speed drivetrains Alloy Backplate