No chain, no derailleur, no problem! . This insane ceramicspeed Driven Concept drivetrain uses a carbon driveshaft turning two sets of bearing pinions to shift across a perfectly flat 13-speed cassette! . They say it’s drastically more efficient than the traditional chain-driven system, and has almost limitless gear ratio options, is lighter, and more aerodynamic! Is this the future of bicycle drivetrains? . Full story on Bikerumor.com now! . #prototype #ceramicspeed #cycling #roadbikes #eurobike