This MARS 9000 is a Sachs Quartz rebranded as a MARS product. It's a quality item - well designed, well finished, well constructed but, in 2001, well beyond its sell-by date. The same basic derailleur also appears on this web site as the Stronglight Rockstrong.

I like the thousands separator in '9,000'. Very European.

• Derailleur brands: MARS
• Country: France
• Date of introduction: 2001?
• Date of this example: unknown
• Model no.: 9000
• Weight: 240g
• Maximum cog: 32 teeth (stamped on the pulley cage)
• Total capacity: 34 teeth (stamped on the pulley cage)
• Pulley centre to centre: 70mm
• Index compatibility: 8 speed
• Chain width: 3/32”
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: aluminium with titanium cable clamp bolts and pulley bolts