Shimano HB20 Outer Serration Disc Rotor Lockring for Centerlock Hubs

The Shimano HB20 Outer Serration Disc Rotor Lockring is a reliable part designed for use with Shimano Centerlock hubs. It fits all 15/20mm thru-axle Centerlock front hubs and is an OEM rotor lockring compatible with XTR M9001/9011/9011-B, XT M8000/8010 Centerlock rear hubs, as well as XTR WH-M9000/9020 wheel sets and XT WH-M8000/8020 front wheels.