Shimano SM-RTAD05 Disc Rotor Adaptor It's never fun when you realize that because of compatibility issues you're unable to use that new part you're excited about. Luckily, there are a few masterminds out there who know how to solve these types of quandaries. As you may know, Shimano's proprietary center-lock hubs cannot mount the standard 6-bolt rotors. Many find this limiting. Cleverly, the SM-RTAD05 Disc Rotor Adaptor adapts standard 6-bolt rotors to Center-Lock hubs. Ride on! Features: Adapts standard 6-bolt rotors to Center-Lock hubs Due to the aluminum spider SM-RTAD10 & SM-RTAD05 cannot be used with Shimano RT86 or RT76 6-bolt rotors Does not fit rotors with aluminum spiders like Shimano RT86 or RT76 6-bolt rotors Uses TL-FC36 for lockring | Shimano | Sm-Rtad05 Disc Rotor Adaptor Black