Halo Mantradrive MT-SS Boost Hubset (12x148mm) 32h PurpleAimed at the emerging inchSlopeduro inch market and single speed conversion Mantradrive 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, made from chromoly for superior durability, reduced cassette bite. Material strength also allows large 6902