I"m currently in the process of building a commuting city bike and I am trying to work out the best gear range.
The setup I'm looking at has gear inches ranging from 40 to around 90.
I'm looking at trying to reach a GI of around 100, but don't want to compromise the lower end too much in case I have to climb. A low end GI of 50 is too high I guess.
An e-assist seems to introduce some possibilities. I wonder if there are motors available which don't have high speed but can help just with climbing.
So low speed and high power is what I'm looking at. Something to cover a gear range of around 20 to 40, and something that's lightweight. I don't need a large battery since I won't be cruising with it and won't need range. Once I get up to speed I switch off the motor and go on pedal power alone.
Are there e-assist kits out there that fit this profile?