This Ultra-Efficient Bike Has No Chains and No Derailleurs

This Ultra-Efficient Bike Has No Chains and No Derailleurs

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A new chain-free and derailleur-free ultra-performing bicycle was introduced this week by CeramicSpeed at the world's leading bike trade show Eurobike in Germany and it blew audiences away. The impressive novel prototype, called Driven, won the coveted Eurobike Award beating 365 other entries.

The most efficient drivetrain imaginable

"Our objective was clear; to design the most efficient drivetrain imaginable. Partnering with the Mechanical Engineering Department at the University of Colorado, we have created a drive shaft concept that utilises 21 CeramicSpeed Bearings and sets a new benchmark as the world’s most efficient drivetrain," says the bike creator's site.

The 21 CeramicSpeed Bearings refer to the 21 bearings featured on the Driven bike 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."

Driven, in essence, functions through a pinion-style driveshaft system instead of the traditional and somewhat inefficient chain and derailleur models. The company claims their new system "creates 49% less friction when compared to the market leading chain and derailleur drivetrain."

The company achieved this by removing the eight points of sliding friction that burden even market-leading chain and derailleur drivetrains. Furthermore, replacing 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.

More impressively, BikeRumor reported that CeramicSpeed conducted tests that indicated that their Driven model achieved 99% peak efficiency. The system was also found to have 32% less friction than the CeramicSpeed optimized DA drivetrain and 49% less friction than a stock Dura-Ace group, both impressive already high-performing models from the company.

Not the first of its kind

This is not the first driveshaft bicycle model ever experimented with by bike companies. However, previous models have always exhibited less power efficieny than chain and derailleur systems.

They also had limitations regarding the changing of flat rear tires, an issue CeramicSpeed has also not addressed. However, the model is not ready for production so time may produce an equally innovative solution.

CeramicSpeed has been working with the Mechanical Engineering Department at the University of Colorado on their Driven bike for only nine months so far. The team is already investigating integrating the driveshaft into the frame to further reduce wear and tear.

The model still needs work obviously but there is no doubt CeramicSpeed is onto something truly transformational. And winning the Eurobike award is no small feat.

The award is "regarded as one of the most prestigious awards in the bike industry" featuring the most advanced work in bike developments. "The high innovation capacity in the bike industry is closely connected to the rapidly changing market, which can be clearly seen at the Award Ceremony and in the Award Exhibition," states the award's site.

Watch the video: Smaller Gears, Slower Riders? Tour de France Gears Explained. Tour de France 2017 (June 2022).


  1. Sprowle

    Rather, rather

  2. Ferar

    so cool to go to a good blog and read for real

  3. Shaktik

    This is already by far no exception

  4. Isdernus

    There is a site on the subject, which interests you.

  5. Lindberg

    It's a pity that I can't speak now - I'm in a hurry to get to work. I will be released - I will definitely express my opinion.

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