Maybe load was not the appropriate word to use. Smith explains that that friction in a chain-based drivetrain is created largely at the eights points of articu

Maybe load was not the appropriate word to use. Smith explains that that friction in a chain-based drivetrain is created largely at the eights points of articulation, where the chain bends around the chain ring, cassette and pulleys. "Any time a chain articulates, friction is created. And any time it disengages, friction is created," Smith said. "When you think about pedaling 95rpm, you are looking at 40,000 stiction points a minute." In the DrivEn system, those eight points are replaced by four points, each of which rotate on ceramic bearings. The chain ring's teeth and cassette's cog engage with the bearings on the shaft, which itself spins on bearings. https://www.bikeradar.com/road/news/article/ceramicspeed-driven-drive-shaft-52587/ https://www.bikeradar.com/road/news/article/ceramicspeed-dri...