Yes, the frames are all one size. You're right, the bicycle industry has to offer many different frame sizes to accommodate riders of all shapes and sizes, as the pedalling is the only way of propulsion. But with e-bikes, the human in-put is of little significance in regards of speed. Our frames fit all average riders, from approx. 160cm (5 ft 2'') rider to approx. 100kg (220lb) rider.
You can modify you e-bike's stand-over height with the seat option (all our frames offer bicycle and moto seat options) and the rear shock configuration (our frames offer 3 shock positioning mount holes).