AbsoluteBLACK has unveiled the HOLLOWcage V2, an oversized pulley wheel system (OSPW) designed specifically for Shimano’s Dura-Ace Di2 12-speed groupset. Priced at €399, this latest iteration offers enhanced performance and a quieter ride compared to its predecessor.
Mono-Plate Design: Precision and Flexibility
Departing from traditional dual-plate designs, the HOLLOWcage V2 features a single-piece carbon-polymer matrix cage. This innovative mono-plate construction not only reduces weight but also introduces controlled flex, allowing the lower pulley to better align with the chainline. This alignment minimizes lateral stress on the bearings, contributing to smoother operation. (absoluteblack.cc)
Silent Shifting with Xring Technology
A standout feature of the HOLLOWcage V2 is the Silent Xring Pulley™ system. By incorporating rubber X-ring bands within the pulleys, AbsoluteBLACK claims a reduction in drivetrain noise by 5–7 dB, equating to approximately a 40% decrease in chain rattle. This technology absorbs the impact between the chain and pulley teeth, resulting in a notably quieter ride, especially during endurance sessions or indoor training. (absoluteblack.cc)
Full-Ceramic Bearings: Durability and Efficiency
The system utilizes bespoke, oversized full-ceramic bearings—Zirconia Oxide races paired with Silicon Nitride balls. These high-quality bearings are independently verified through X-ray diffraction by Lucideon Ltd, ensuring exceptional durability and performance. AbsoluteBLACK offers a 4-year warranty on these bearings, underscoring their commitment to quality. (absoluteblack.cc)
Specifications at a Glance
- Weight: 66g (±1g)
- Materials: Carbon-polymer matrix, 7075 aluminium, rubber, ceramics
- Compatibility: Shimano Dura-Ace 9250 Di2 12-speed (up to 34T cassette)
- Bearings: Full-ceramic (Zirconia Oxide races, Silicon Nitride balls)
- Lockring Colours: PVD Rainbow, Black, Titanium, Red, Gold
- Included in Box: Complete cage assembly plus lockring tool
- Price: €399
While AbsoluteBLACK does not claim specific power gains, the HOLLOWcage V2 is engineered to provide a quieter drivetrain and distinctive design. Priced at €399, it offers a more affordable option compared to the first generation. (absoluteblack.cc)
For more information, visit AbsoluteBLACK’s official website. (absoluteblack.cc)