SRAM X9 9-Speed Rear Derailleur

Information from: http://www.sram.com/sram/mountain/products/sram-x9-9-speed-rear-derailleur.

The X.9 utilizes SRAM's famous shifting technology in a super-light, slim chassis. The X.9 sets the standard for performance, weight, materials and good looks.

Specifications

Bolts: 7075 Alloy

B Knuckle: Forged 6061 Alloy

P Knuckle: Grilon Composite Painted

Inner Cage: 6061-D-Stamp or Composite

Compatibility: 1:1

Outer Cage: ADC6 Die-cast AL Polished

Weight: 215/204 grams

Material: Aluminum alloy links and forged B-knuckle, High Strength Grilon P-knuckle, Sealed cartridge bearing upper pulley, Aluminum long/medium-cage/composit short cage

Speeds: 9-speed