Compatible with Shimano's new LX hydraulic disc brake. Centerlock design the same as on XT and XTR. Double Contact Seals-Shuts out water, dust, and mud from the hub bearing
Borozon Treated Races: Diamond polished bearing races provide ultra-smooth bearing action. Freehub accepts 9-speed sprocket clusters. Drillings: 32 or 36 hole. Select Front or Rear.