• Derailleur brands: Gipiemme, manufactured by SunRace
• Country: Italy, manufactured in Taiwan
• Date of introduction: 1997?
• Date of this example: unknown
• Model no.: 597
• Weight: 323g
• Maximum cog: 32 teeth? (roughly based on Shimano Deore XT (M739 SGS))
• Total capacity: 38 teeth? (roughly based on Shimano Deore XT (M739 SGS))
• Pulley centre to centre: 87mm
• Index compatibility: 8 speed
• Chain width: 3/32”
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: largely aluminium with steel pulley cage plates

Ref. 1637