Riding Up Hills
Hardly surprising: Being able to ride up hills is an often cited reason for acquiring an electric bike.
On our regular bicycle most of us leisure riders seem to find pedaling between 50 and 100 Watt agreeable. 80 W of pedaling is miraculously all that's needed to glide along on level ground at 14 mph.
Gliding Up Hills
Produced by EMSfilm
Has the time come to make riding on steep hills enjoyable?
Breathing heavily, wheezing
lungs, thighs in pain
Gripping handle bar, squeezing
stretching the chain
Copyright © 2013 Eric Sundin
Of course, the agreeable pedaling effort that propels us with such ease on level ground proves woefully inadequate uphill. While e.g. 170 W of pedaling effort will propel an average weight rider up a 'moderately steep' hill of 7%, he or she shall nevertheless crest at a mere 5 mph.
However, in partnership with a stoic 250 W electric motor the same rider shall manage the same 7% hill at twice the speed, i.e. 10 mph—while exerting no more concurrent pedaling effort than the above referred to 50 to 100 W of agreeable pedaling.
The Giant Twist, iZip Path & Vibe, eZee ForzaEV & Quando folder (you may enjoy the video in the right column) all develop 250 continuous Watt of electric power. Adding the same 50 to 100 W of agreeable concurrent pedaling the rider thus commands a combined 300-350 W of power, which very few ace cyclists can keep up and most of not even manage in spurts.
On a bicycle with a 350 W model BionX or the eZee power kit installed the rider thus commands a combined 400-450 W or a level of power that can be pedaled only by the world's top bicycle road racers!
For those nevertheless interested in even more power for cresting serious hills with only perfunctory pedaling we offer several 'hill flattening' 500-600 W category bikes: eFlow; iZip Zuma, E3 Metro & Ultra; eZee Forza, Sprint & Torq; Stromer.