- CeramicSpeed is a bike company that has made a bike that needs no chain and no derailer of obviously

- it has an ultra-efficient drive train which was there objective

- they used 21 CeramicSpeed bearings to increase its functionality and efficiency; these bearings "transfer torque from the front ring through the drive shaft, then onto the 13-speed rear cog"

- here are some models

- the venge

- the hero

- the lux

- another way they made it more efficient is by removing eight points of sliding friction

- replaced the “metal chain with a carbon driveshaft resulted in a bike with a two-dimensional more aerodynamic profile that reduces drag and enables a lower weight”

- here are some statistics

- driven model achieved 99% peak efficiency

- 32% less friction than the CeramicSpeed optimized DA drivetrain

- 49% less friction than a stock Dura-Ace group

- which are both already impress bikes

- here is another picture up close so you can see how it works

- credits

- https://interestingengineering.com/this-ultra-efficient-bike-has- no-chains-and-no-derailleurs

- https://www.ceramicspeed.com/en/d2/

- https://www.dezeen.com/2018/07/20/ceramicspeed-driven-bicycl e-no-chain-eurobike-award/