These Dutch rowingbikes have also had various forms of string drive for over a decade: https://rowingbike.com/en/modellen/ https://rowingbike.com/en/modellen/

These Dutch rowingbikes have also had various forms of string drive for over a decade: https://rowingbike.com/en/modellen/ https://rowingbike.com/en/modellen/ with cables either in steel or in dyneema (polymer-based).