Wolf Tooth Components WolfCage Combo Pack: Includes 49T Cog 18T Cog SGS Adaptor Cage for XT8000 Red UWM3H_HC551

Product details:

Realizing the need for riders desiring more low-end for powering up climbs without using a front derailleur, the WolfCage and Giant Cog Kit for Shimano 11-speed provides the massive low-end capabilities of its 49-tooth Giant Cog. This particular kit works exclusively with 11-speed Shimano cassettes and rear derailleurs. It modifies both 11 to 42-tooth and 11 to 46-tooth Shimano cassettes, giving you a larger range of usable gears for conquering widely variable terrain.