Shimano Saint FH-M820 Rear Hub - 10/12 x 135mm, Center-Lock, 11spd, Black, 32HWith quick engagement, angular contact bearings, and quality sealing, Saint series hubs are perfect for all gravity MTB applications. Easy disc brake rotor installation with spline mount and lock ring Stiff and lightweight Labyrinth & Contact Sealing Product Specifics Rear Axle: 10mm Thru x 135mm Rear Axle: 12mm Thru x 135mm Cassette Body Type: Shimano HG Color: Black Skewer Included: No Bearing Type: Loose Ball Defined Color: Black Spoke Interface: J