This is a fantastically blatant copy of the Shimano 600 EX 6200 of 1978. The ‘555’ designation has a curious echo of Shimano’s ‘333’ logo. SunRace have even copied the Shimano’s weird psychedelic Arabesque patterns that are so reminiscent of your auntie’s 1960s vinyl wallpaper - perhaps the whole derailleur looks better viewed through a Lava Lamp.

The silver 555 Arabesque was merely surreal, the black finished version is obviously the true connoisseur’s choice.

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• Derailleur brands: SunRace
• Country: Taiwan
• Date of introduction: 1984?
• Date of this example: unknown
• Model no.: 555
• Weight: 183g
• Maximum cog: 28 teeth
• Total capacity: 28 teeth
• Pulley centre to centre: 46mm
• Index compatibility: friction
• Chain width: 3/32”
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: aluminium