CeramicSpeed has introduced a drivetrain concept – DrivEn – that eliminates the need for both front and rear derailleurs as well as the chain. It’s an interesting development from a company that sells chains and pulley wheels!
Partnering with the Mechanical Engineering Department at the University of Colorado, CeramicSpeed has created a drive shaft concept that claims to set a new benchmark as the world’s most efficient drivetrain. DrivEn claims to ‘creates 49% less friction when compared to the market leading chain and derailleur drivetrain.’
A traditional chain and derailleur drivetrain contain eight points of sliding friction, which is generated from the articulation of the chain at these points. CeramicSpeed’s new DrivEn concept impressively eliminates all eight points of sliding friction.
To achieve performance, Driven uses CeramicSpeed Bearings in a pinion style drive shaft system. In total 21 CeramicSpeed Bearings play a role in the functionality and efficiency of the system. Thanks to their low rolling friction and longevity, the bearings transfer torque from the front ring through the drive shaft, then onto the 13-speed rear cog.
At the head of CeramicSpeed’s DrivEn Project is company Chief Technology Officer and founder of Friction Facts, Jason Smith. He said “CeramicSpeed has proudly accomplished what many have said couldn’t be done. We achieved a 99% efficient multi-speed drivetrain while eliminating the chain and complex rear derailleur. Advancements in drivetrain technology have been evolutionary since the 1920s.
“DrivEn is truly revolutionary given its unique rolling element power transfer and unmatched efficiency. The DrivEn concept has the ability to change the way the cycling industry views drivetrain design and drivetrain efficiency.”
Acknowledging its level of innovation, the Eurobike Award jury chose DrivEn as one of the winners of this year’s edition, amongst 366 entries. The original prototype is displayed at CeramicSpeed’s Eurobike stand B3-205 from 8-10 July. The award-winning concept bike is also on display in Foyer West in a special Award exhibition throughout the Eurobike show.