Pedal 521Features at a glance Axis length The City Pedal is available in four different lengths. The version with shorter axis is suitable for small shoe size and at the same time small seat bone distance. The so called Q factor can thus be reduced. Ergonomics Conventional pedals force the feet into an almost parallel foot position. The extended axis of the SQlab 521 City pedal allows a physiologically natural foot position. This minimizes one sided stress