ABSOLUTE BLACK Oversized Derailleur Cage System Hollowcage | Shimano Dura Ace 9100 / Ultegra 8000
With the Hollowcage, the guys from Absolute Black are breaking new ground when it comes to oversized derailleur cages. The monoplate construction is lighter and more aerodynamic than any other solution on the market to date.
Stiff roll
The popular belief is that a stiff cage also means good shifting. But if you take a closer look at how the derailleur system works, it quickly becomes apparent that the gearshift precision depends largely on the upper roller. Since the upper roller is installed directly in the pivot point, the rigidity of the cage hardly plays a role in the switching precision. Rather, a rigid bearing the roll is crucial. In contrast to other manufacturers, Absolute Black uses oversized bearings in order to reduce the lateral play of the rollers to a minimum and thus increase the switching performance.
Flexible cage
The construction of the cage allows a certain alignment of the lower roller in order to let the chain run as straight as possible. In addition to the easy running of the chain, this feature also reduces the running noise.
Xring pulley
The Xring pulley, for which a patent is pending, uses special rubber bands to reduce the noise of the chain by 12-14dB compared to the standard Dura Ace rollers. This corresponds to a noise reduction of around 60%.
High tooth profile
Some of the competitors use rollers with a very flat tooth profile in their oversized derailleur cages. However, a tooth that is too shallow will never shift the chain to another gear as precisely as a high tooth can. For this very reason, Absolute Black uses very high teeth on the upper roller of the Hollowcage. In connection with the large and rigid bearing this results in the best possible switching performance.
Playing with saving watts
There are many variables that can help save one or the other watt. With the Hollowcage, lightly greased all-ceramic bearings are used for maximum service life. Thanks to the high tooth profile, the system manages with little cage tension and still switches with excellent precision. The aligning lower roller also saves a bit of power as the friction in the chain run is minimized.
The cage fits Dura Ace R9100 / 9150 and Ultegra R8000 / 8050 rear derailleurs. It does not matter whether mechanical or Di2, medium length (GS) or short cage.
IMPORTANT:
When traveling, please remember to dismantle the entire rear derailleur with an Allen key, as very few bicycle transport bags offer enough space for such large rear derailleur cages.
Technical specifications:
intended use : road, triathlon
Material cage: carbon fiber-polymer matrix
Material rollers: plastic, rubber
Bearing: ceramics
Number of teeth: 12 (top) 18 (bottom)
Compatibility: Shimano Ultegra 8000/8050, Dura Ace 9100/9150/9170
largest sprocket: 32 teeth
Color: PVD Rainbow, black, titanium, gold or red
Weight according to the manufacturer: 71g (+/- 1g)
Weight weighed: 70g
Scope of delivery: 1x ABSOLUTE BLACK Oversized derailleur cage System Hollowcage | Shimano Dura Ace 9100 / Ultegra 8000