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absoluteBlack Carbon Hollowcage Shimano Ultegra


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HOLLOWcage® for Shimano Ultegra 8100 12spd. Our revolutionary mono-plate OSPW design is the quietest and best shifting, oversized derailleur cage for Shimano 12spd created to date.

HOLLOWcage ® OSPW has a carbon-polymer mono-plate construction with bespoke, oversized, full ceramic bearings and the most advanced silencing pulleys ever made.


  • Weight: 71g
  • Size: 12/18T
  • Colour: Lower lockring Black, Titanium, Red, Gold & PVD Rainbow
  • Compatibility: Shimano Ultegra R8150 12spd derailleurs, fits up to a 34T cassette
  • Materials used: Carbon fiber-polymer matrix, 7075 Aluminium, rubber, ceramics
  • In the box: Complete cage, lockring tool, 2x spare xring rubbers.