Reverse Components Centerlock to 6-Bolt Rotor Adapter Description: The Centerlock Adapter is compatible with all centerlock front wheel hubs and all centerlock rear hubs and is designed to convert these hubs to accept 6-bolt disc brake rotors. Features: Adapter for converting Center Lock hubs to accept 6-hole brake rotors Compatible with all Shimano Center Lock front and rear hubs Only approved for use with one-piece brake discs Specifications: Material: Aluminum Color: Black Weight: 30g