M529 29er rear hub for 6-bolt disc 32 hole Tough & light weight 29er specific 9-speed hubs offer super smooth rolling in all environments The Freehub body is specifically designed for high-torque low gear ratio applications for example when using 36T sprocket with 22T chainring The hub uses angular contact bearings designed to cradle the balls giving both radial & lateral support for superior strength & durability in real world riding conditions; they also offer precision bearing adjustment & easy maintenance Cone races are ground with Cubic Boron Nitride tool for high precision durability & smooth rolling Forged then anodized alloy hub shell for maximum strength & long lasting good looks Micro ratchet Freehub body design for quick pawl engagement every 11.25 degrees provides quick power transfer 6-bolt disc rotor mount Double contact seals with internal grease sleeve to keep the elements out & the grease in Comes complete with quick release skewer Average weight 392 grams