Of all the items currently on display at this year’s Eurobike show in Germany, one of the most attention-getting is CeramicSpeed’s DrivEn pinion-style shaft-drive system. According to its designers, it creates 49 percent less friction than the high-end Shimano Dura Ace chain-and-derailleur setup. At the heart of the prototype drivetrain is a cylindrical carbon fiber […]
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