• Derailleur brands: SunRace
• Country: Taiwan
• Date of introduction: 2008
• Date of this example: unknown
• Model no.: R90 SD
• Weight: 253g
• Maximum cog: 27 teeth (SunRace)
• Total capacity: 29 teeth (SunRace)
• Pulley centre to centre: 50mm
• Index compatibility: 9 speed (SunRace)
• Chain width: 3/32”
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: fully aluminium parallelogram with steel pulley cage plates

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