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As seen at Eurobike, CeramicSpeed's bicycle transmission replaces the chain and derailleur with a drive shaft and ceramic bearings. A device that would significantly reduce friction compared to the best chain-derailleur systems.
This is an innovation that will interest fans of cycling . The American brand CeramicSpeed designed a new transmission system for bicycle which removes the chain and derailleur. The system, based on a tree, lignified plant
A tree is an upper terrestrial plant, whether gymnosperm or angiosperm, which is stiffened by secondary growth (the one that produces wood) …. "data-image =" https://www.cdn.v5.futura-sciences.com/buildsv6/images/midioriginal/8/8/1/881dff8587_48849_def-tree-stevegrosbois-flickr.jpg "data-url =" / planet / definitions / clbadification-living-tree-14137 / "data-more =" Read more "> shaft transmission and bearings in ceramic has just been awarded at the Eurobike fair, currently held in Germany.
Called DrivEn, this transmission, still in concept, consists of a transmission shaft in carbon fiber which replaces the chain, and ceramic bearings arranged at each end.These lead on one side the mono- plateau before and the other the cbadett e on the rear wheel, actually a set of notches installed in concentric circles. The interest of a system? In addition to superior reliability, reduced exposure to impact, dust and water, DrivEn significantly reduces friction . According to CeramicSpeed, this transmission reduces friction by 49% compared to the Shimano Dura-Ace group, which is currently the best in organic matter, nitrogenous matter, etc.
There are different families such as:
organic matter, which constitutes living things (animals or plants) or … "data-image =" https://fr.cdn.v5.futura-sciences.com/buildsv6/images/midioriginal/e /7/0/e70ccaaf4a_91935_matiere.jpg "data-url =" / sciences / definitions / matter-matter-15841 / "data-more =" Read more "> subject .
The DrivEn system does not yet handle speed changes
In a chain-derailleur transmission, friction occurs on the eight points of articulation when the chain wraps around the plate, pulleys of the derailleur and DrivEn reduces the number of friction points to 4. However, the principle of this transmission is not a novelty in itself. It already exists but uses tapered bearings that produce much more friction.
For the moment, CeramicSpeed indicates that its innovation still requires development because the change in velocity having a direction and an intensity is represented by a vector, the velocity vector. Relative speed is the speed of one body relative to another or relative to a landmark. "Data-image =" https://en.cdn.v5.futura-sciences.com/buildsv6/images/midioriginal/ 3/1/9 / 319daf63f4_77541_leibniz-dp.jpg "data-url =" / science / definitions / physics-speed-324 / "data-more =" Read the definition "> speed is not The builder's idea is to install a servomotor inside the driveshaft to move it back and forth on the cbadette.The rear bearings would then mesh on a different circle, smaller or greater.We will follow this with interest.
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