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Will I run into issues with the high torque required on a 20" wheel?
The smaller diameter will lower your gearing so torque shouldn't be a problem so long as you can lace the hub into the rim.
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These front hub motors look nice and simple...
Where's your cargo going?
Just I remember fucking about with the front hub motor Treks when I worked in a dealer. Lean back, pedal a little and spin up the front wheel. Would imagine an upright rear loaded cargo bike would do this almost all the time.
Emyr
M_V
@Jon.
On the topic of electric cargo bikes, anyone have any experience with retrofitting hub motors?
I just need a little assist for the hills of Sheffield when loaded (looking at a maximum of 150kg of total weight, and no desire for massive speeds). These front hub motors look nice and simple, and the battery could be mounted under the loading area quite neatly. Will I run into issues with the high torque required on a 20" wheel?