When you realize that slow eddy is a liar and a fraud that pretends to be a n expert on every subject this company might interest you if you want to un derstand current(pun intended) electric bike motor technology:
"High Speed (S) or High Torque (T)
One of the decisions you will have to make if you buy a Crystalyte is wheth er you want to go with a motor wound for torque or one wound for speed. So me of the following factors need to be weighed before making a selection ap propriate to your needs:
Wheel size
Battery pack voltage you anticipate running
Amperage requirements/limitations
Terrain and riding style requirements: will you be climbing a lot of hills or primarily using it on moderate
How big of hills do you ride? Off-road or blacktop? Aggressive riding style or around town laidback cruising?
Gearing will change depending on what the size of your wheels are. A 20-in ch wheeled bike will be geared lower than a 29er, which will be geared supe r high. The more amps and voltage you pump, the more likely you should go w ith a speed motor for top speed since torque will not be much of an issue. However if your daily commute involves climbing steep grades you are better off with the high-torque motors and smaller wheels, and may want to consid er limiting the volts and amps to keep from smoking your motor.
Rule of thumb: The HT is more efficient at lower speed; the HS is more effi cient at higher speed."