The SunRace Driven RZ was the first step in SunRace trying to make a road derailleur that was truly world class. It certainly used world class materials, with an aluminium hanger bolt, a carbon-wrapped outer parallelogram plate and pulley cage plate and a titanium cable clamp bolt. It shared all this tech with gold anodised touches, a certain Campagnolo-like carbon look and groovy cutaway sealed bearing pulleys.

All of this is terribly impressive - except the weight. In 2008, that chunky 200g was more Ultegra than Dura-Ace - and neither of these Shimano models flirted with carbon or titanium. Odd.

You may also note a large number of similarities between this derailleur and some microSHIFT designs, this may indicate that the two companies worked together on this derailleur.

• Derailleur brands: SunRace, possibly designed in association with microSHIFT
• Country: Taiwan
• Date of introduction: 2008
• Date of this example: unknown
• Model no.: GRDVRZ10
• Weight: 200g
• Maximum cog: 27 teeth (source: SunRace)
• Total capacity: 29 teeth (source: SunRace)
• Pulley centre to centre: 50mm
• Index compatibility: 10 speed
• Chain width: 3/32"
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: aluminium with a carbon wrapped outer parallelogram plate and pulley cage plate, an aluminium hanger bolt and a smattering of titanium small parts