11 speed Follow Mercury hubs as of 2013 are 11 speed compatible. You may need to purchase a cassette body - use Submit a request feature to confirm. Make sure to include a photo of your rear hub. Related articles Axle Conversion? I'm willing to convert, tell me more. "S" series v. "M" series Crash Replacement Overview Campy compatible? Comments 0 comments Please sign in to leave a comment.