This is the Absolute Black Hollowcage Review
https://www.hambini.com/review-absoluteblack-700-ospw-leaves-company-reputation-in-tatters/
Key Points.
- 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
- 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
- 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
- Their bearings are very soft for a ceramic bearing, they scratch easily
- The bearings are extremely flexible and lack any rigidity, this is a combination of excessive clearance and a weak cage
- Sale price to the trade is approximately €230
- 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.
Webpage with more information
https://www.hambini.com/review-absoluteblack-700-ospw-leaves-company-reputation-in-tatters/
Website: https://hambini.com
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