Fietsen op Maat ROM-Pedal Eccentric Pedal Device. The eccentric pedal device will be mounted against the existing crank (pedal arm) of your bike. - Cycling with a 70 degree knee angle (flexion). In comparison: when you do not have any limitation in your hip or knee, the required bending (flexion) of your knee is about 120 degrees when the pedal is in the most upward position.