What is Cadence and what role does it play with my E- bike?
It’s how fast you spin your legs & it effects comfort, range, speed, fun, exercise & endurance. It also keeps those in uniform from thinking too hard about how you manage to go 25 mph without moving your legs.
With all of the information available on E bikes and e- bike conversions I find it puzzling that the topic of selecting gear ratios for our e-bikes is so seldom discussed. Part of this, I’m sure stems from the fact that the majority of today’s E bike conversions are front or rear wheel hub motors and run completely independent of the bikes original drive-train. In addition to a lack of a physical attachment, the subject of cadence, gear ratios, crank sets, freewheels and the 100 year history of everything just mentioned would be large enough to dictate a forum dedicated to that alone. However, whether it’s independent or just to complicated, people, pedals & gears must remain an integrate part of the bicycle’s drive-train. Check out any road bike or mountain bike forum or website and pedal RPM, (cadence) gearing and shifting will be discussed in great detail, yet most electric bike forums rarely discuss the subjects at all. This is, in my opinion an oversight that needs addressed. Regardless of which E-Bike Kit you choose for your conversion project, in order to get the best range and most performance from your newly converted bike, your legs must remain a part of the equation. Since every rider has a certain speed at which they like to spin their legs and we don’t ride in a vacuum we need gears in order to maintain that speed. At this point you might be tempted to say that the hub motor is now doing what the legs and gears were doing before and you would be right. Except that this is not a motorcycle. It’s an electrically assisted bicycle.
That said, I did not pay too much attention to the gearing on my 1st e-bike conversion either. It was on an 1990 Mongoose with a 500 watt Crystalyte hub motor on the front. My gears actually quit working properly after about 6 months from lack of use. I mean aside from needing a place to rest my feet, I’m only going to peddle when I’m climbing a grade or my battery dies. I was far more focused on things like the battery voltage, amps, motor controllers, etc. Perhaps it was the “motor head” in me but It was only after the novelty of the electric motor had worn off and I got into the routine of using my bike for practical transportation that I began to pay attention to practical items like range, cargo capacity, comfort, etc. Let’s face it, in retrospect, the primary reason for electrifying my bike was to increase it’s practicality. NOT taking pedal power into consideration was ,…….. well, very unpractical. Read the rest of this entry