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.