The Wolf Tooth Gnarwolf Chainguide is perfect if you are a rider that fearlessly takes the tough lines and can't afford to drop a chain. Designed specifically around 1x wide/narrow chainrings the GnarWolf will keep your chain glued to your chainring in the roughest and muddies of conditions.  Patented infinite chainline adjustment between 48mm and 54mm via an elliptical expanding mandrel. There are no shims required!  Infinite vertical adjustment between 28t and 36t for round chainrings and  28t-34t elliptical. Wolf Tooth Gnarwolf Chainguide Features 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 rigors of Enduro, heavy trail, mud and even DH riding, the Wolf Tooth engineers made this guide extremely stiff and strong while keeping it light at 44g Specific guide shaping is optimized for use with elliptical and round chainrings Installation takes just a few minutes – no need to remove your crank arms Wolf Tooth Gnarwolf Chainguide Compatibility Designed to fit on any bike with an ISCG 05 Mount Installation shown in photos on this page Optimized for use with both elliptical and round chainrings - round chainrings 28t-36t or elliptical chainrings 28t-34t For 1x use only Minimum distance of 10 mm between crank and center of ring Wolf Tooth Gnarwolf Chainguide Exceptions Due to frame and bike geometry there will be some bikes that need modifications or flat out won't work. Here are the known exceptions: Ibis Mojo 3 - will not work Ibis Ripmo - will not work Specialized Stumpjumper 2016-2017 models require 1 mm of spacers (washers will work) between the frames ISCG05 mounts and the guide (the guide interferes with the frame otherwise). Evil The Following - will not work (upper swing arm interferes) Wolf Tooth Gnarwolf Chainguide Specifications Weight:  44g Material: 6061-T6 with stainless steel hardware Made in the USA