This derailleur was produced to commemorate the 20th anniversary of the founding of SRAM in 1987. Particular features included an engraved aluminium hanger bolt, a titanium parallelogram spring, sealed bearing pulleys and a CNC machined carbon fibre outer pulley cage plate.

SRAM’s commitment to innovation was demonstrated by the one-to-one actuation and the use of composites in their original ESP 900 model. But with the X-0 they have gone further and introduced a radically new ‘look’ for a derailleur. This has only been carried off a few times; by the Simplex Tour de France, the Campagnolo Gran Sport and by the Suntour Competition. I hope that the X-0 joins that hallowed list.

---

• Derailleur brands: SRAM
• Categories: SRAM - the X series
• Country: USA, manufactured in Taiwan?
• Date of introduction: 2007
• Date of this example: 2007
• Model no.: unknown
• Weight: 197g
• Maximum cog: 34 teeth
• Total capacity: 37 teeth
• Pulley centre to centre: 75mm
• Index compatibility: 9 speed
• Chain width: 3/32”
• Logic: top normal
• B pivot: unsprung
• P pivot: sprung
• Materials: aluminium, with a carbon composite lower knuckle and outer pulley cage plate.