DESCRIPTION Our Box Two tier's mission in life is to deliver performance similar to the Box One but without its exotic (and costly) features. You still get the Tri-Packâ„?Clutch in our derailleur only it isn't adjustable. The cassette's 11-50T range is equally impressive but we don't cut it out of a single block of steel. The action on the shifter is just as snappy although you don't get the rigid die-cast pull lever. The chain boasts the same unique ability to mate with a wide/narrow chainring except you give up the trick DLC top coat. You're hardly shortchanging yourself with Box Two. FEATURES Our Most Durable DrivetrainFor Aggressive TerrainPrime 9 Technologyâ„?/span>Install at Home with Some Simple Bike Tools and Our Easy to Follow VideoTri-Packâ„?Limited Slip ClutchUltra-Wide Ratio with Consistent ProgressionCompatible with Traditional Derailleur Hangers (Non Direct-Mount)Cassette Compatible with HG Freehub BodiesPrime 9 Technologyâ„?/span> BX-DT2-P9AMXW-KIT INCLUDES Box Two Prime 9 Multi Shift Shifter Box Two Prime 9 X-Wide Rear Derailleur Box Two Prime 9 11-50T Cassette Box Two Prime 9 126L Chain Nickel Box One Shift Cable & Housing Kit