Halo Mantradrive MT-SS Rear Hub (10mm Bolt) 32h PurpleMantradrive features 150 points of engagement: Utilizing a leaf spring mechanism with 7 contact points per spring and a 150 tooth drive ring. The system delivers 2. 4 degrees of rotation for near instant engagement A short single speed style HG driver for Singlespeed and Dirt Jump, made from chromoly for supeirior durability, reduced cassette bite. Material strength also allows large 6902 bearings to fit inside the freehub No cog is included so user