Check the listing for details. Wolf Tooth Gnarwolf Chain Guide Rev2 with Infinite Chainline & Vertical. Color: Black, Condition: New. Listed at 54.29 USD. Updated with new head shape and lower cost . Infinite chainline adjustment between 48mm and 55mm via an elliptical expanding mandrel. There are no shims required . Infinite vertical adjustment between 28t and 36t round rings (28t-34t elliptical) . 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/oval and round chainringsDesigned for use with round chainrings 28t-36t or oval chainrings 28t-34t on bikes with an ISCG-05 Mount. Infinite vertical.