This is the Absolute Black Hollowcage Review

https://www.hambini.com/review-absolu...

Key Points.

1. AB claim the bearings do not spin freely because they were designed that way. The analysis shows the fit is poor, the bearing is extremely flexible
2. AB claim their bearings are fully ceramic. In tribology, that would be considered to be a full complement bearing, typically one that is devoid of a cage. These bearings contain a significant amount of plastic
3. From their own videos and analysis AB has used a torque transducer that measures to +/- 0.66W (+/-0.015Nm @ 44.53Rad/s) to claim their OSPW is 0.132W superior to that of Ceramicspeed
4. Their bearings are very soft for a ceramic bearing, they scratch easily
5. The bearings are extremely flexible and lack any rigidity, this is a combination of excessive clearance and a weak cage
6. Sale price to the trade is approximately €230
7. AB Graphenlube does not appear to have a Safety Datasheet.

I cannot emphasise how important point 3 is, the product is marketed and sold on it's wattage savings.

for clarification, the torque distribution mentioned is towards the centre of the bike frame. technically it's a torque vector. end loads (torque) are prohibited with torque sensors but a power meter will generally have this capability built in.


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Webpage with more information
https://www.hambini.com/review-absolu...

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