The Shimano SLX FH-M7110/M7130 rear freehub features a Micro Spline freehub body and is centerlock disc compatible. Features: The aluminum Micro Spline freehub body is lightweight and seamlessly integrates with small 10-tooth top gears Shimano's Centerlock system makes disc brake rotor installation easy with a spline mount and lock ring Features Shimano's Quick Engagement technology which equips the hub with 18/16 notches and two sets of pawls to double the engagement and optimize traction for faster acceleration Specs: ColorBlack Defined ColorBlack Spoke InterfaceJ-Bend Rear Axle12mm Thru x 142mm Weight352g Cassette Body TypeShimano Micro Spline Flange Diameter, Left61 Hub/Brake CompatibilityCenter-Lock Disc Hub Drilling28 Flange Diameter, Right61