• Derailleur brands: SunRace
• Country: Taiwan
• Date of introduction: 2012
• Date of this example: unknown
• Model no.: R91 LD
• Weight: 272g
• Maximum cog: 28 teeth (SunRace)
• Total capacity: 39 teeth (SunRace)
• Pulley centre to centre: 87mm
• Index compatibility: 9 speed (SunRace)
• Chain width: 3/32”
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: largely aluminium with a steel inner parallelogram plate and steel pulley cage plates

Ref. 736