PERS chainless e-drive makes ebike debut in speed-pedelec concept
Bike chains are messy and noisy, and can fail when pushed to their limits on powerful ebikes. Where some manufacturers replace them with belts, French e-drive innovator Cixi ditches both in favor of an electronic crankset system, and has partnered with Look Cycle to showcase the technology in the Rover 45 concept speed pedelec.Cixi has dubbed its e-crankset the Pedaling Energy Recovery System, or PERS. Essentially, onboard electronics controlled by custom algorithms set the resistance at the pedal, and the energy is…