Originally Posted by
keg61
Thanks Chas, i'm really over my head here,when I first started thinking electric I thought it was a "bolt on and go" project, I'm learning that was a very very wrong attitude
LOL, yeah, I did a lot of engineering when I put my system together. In your case, the weight and the hill climbing capability is an issue.
One idea is to ask a reputable vendor -
EM3ev about their products, and your requirements. They will be able to give you some good advice. They sell both a good hub motor and a mid drive.
Certainly with climbing with a heavy load, there is a lot to be said to using a mid drive configuration to take advantage of the bike's gearing.