Genuine Bontrager BackRack parts ensure proper rack-to-bike connection. Details: - Parts and accessories for past and present BackRacks - Pre-2009 BackRacks use stamped steel struts - Post-2009 use tubular alloy struts - Cargo net is made of stretch webbing and attaches to any BackRack via nylon hooks - S-bend mono stay attachment provides additional mounting options for BackRack 1 and 2 - BackRack 2009 parts kit also works with BackRack Lightweight