Even with all the fancy derailleurs and chainrings, dropped chains can still happen. The Gnarwolf Braze On Chainguide from Wolf Tooth will keep your chain secured.

Features:

• Patent pending infinite chain line adjustment between 45mm and 51mm via an elliptical expanding mandrel. There are no shims required!
• Infinite vertical adjustment between 34t and 46t for round and oval chainrings.
• Loosen one screw to flip the guide out of the way for easy chain removal without losing any of the guide's adjustments.
• All adjustments made with common 4 mm hex key.
• Designed for the rigours of the muddiest CX course or roughest gravel riding, the Wolf Tooth engineers made this guide extremely stiff and strong while keeping it light at 44g.
• Specific guide shaping is optimised for use with elliptical/oval and round chainrings.
• Installation takes just a few minutes -- no need to remove your crankarms.