Originally Posted by
linberl
While I do love the look, I think the Brompton is out. I'd have to spend over 2 grand to get down to 21-22 lbs and then spend more to make it fit me :-(. I think the weight matters more than a 2d gear to me. I just came back from a ride and I didn't shift once...a little momentum, some fast spinning and some slow mashing.
BUT - your idea of a second wheel is genius!!! And it's something I can do as the need arises, assuming it does, and for far less than a titanium Brompton. I'm also reading up on White Industries dual freewheel (one freewheel with two sets of cogs on it!). There also might be some other cool options out there if I keep looking. But I'm thinking a super light <18lb ss is the best start.
As for the motor, there are lots of single speed ebikes out there (in fact, most of the ebikes guys build on endless sphere are ss). So I'm confident I can figure the gearing out.
The Pakit is sweet in it's own way, not as classic or elegant as the Brompton, but I do like it.
Yes, the ShareRoller will eliminate much need for gears if you're already doing well with one speed. I have a Rivendell with a mid-drive kit: That design requires some shifting to keep the pedals spinning and avoid overheat, but I still only use the top 4 gears most of the time.
For your application I would shoot for one gear you're happy riding on flats, and think of the ShareRoller as the downshift for hills..forget trying to finagle 2 speeds in there. The trick will be to keep the front chainring big enough that you won't be constantly spinning out on the power. Personally I'd start with the stock setup and make any future gearing decisions after you've installed the e-kit.