Electra Amsterdam Alloy Men's Bicycle Rack (Black) Amsterdam Rear Rack is made of aluminum and features eyelets to attach a Rear Rack Strap (sold separately). Rack is black and requires Seat Clamp with Rack Mounts (sold separately) to attach. Fits: Men's Amsterdam Original 3, Classic 3, Sport 3, and Royal 8 Only Not compatible with: Amsterdam Sport 3 Custom, Sport 9D, and Balloon 8D.