There's one serious issue with that arrangement that first became apparent with Stokemonkey, before any recognizably modern mid drives. Experienced cyclists try to maximize power by increasing pedal cadence. If that cadence is situated at a motor RPM that yields maximum efficiency, gross power is plummeting at the same time. So right when the rider is trying to make max power, motor power is dropping off precipitously. It made people think that Stokemonkey was much less capable than it actually was. Over time, riders could have developed the habit of gearing up and letting cadence drop to help the motor stomp out big wattage, but many became disappointed and never learned how to do it.yeah I wish there was a version of the BBS motors that had the power (actual motor) of the HD but had a larger down-ratio that brought max efficiency at right about 90-95 rpm. That'd be a real dream for pedelecs.