First I had to build the front wheel. There is a video of this in the works. I hope to post it soon.
Next I finished the build enough to roll and stop and pedal in first gear.
I managed to get a short test ride. Since the internal hub shifter isn’t hooked up I’m stuck in first gear. Once I get the shifter installed I’ll be able to get up to speed and go for a longer ride.
The short ride I had was interesting. It felt very nimble and quick turning, maybe too quick. I’ll know more when I can shift into a higher gear and get some speed up. I can turn on a dime. This will make it easy to navigate a crowded downtown peloton but might make it too twitchy for higher speeds.
You can see the final geometry in the photo. The laid back seat tube angle stands out. The space between the seatpost and rear wheel will be filled with a battery/controller box.
The reason for the seat post angle is because a complete donor rear triangle from a 26” bike was used. For a 20” bike, the bottom bracket is higher than a 26” bike. This decreased the seat tube angle to 65 degrees.
There is plenty left to do. I have to choose an electric bike conversion kit and install it. I’ll make a video of that.
I also need to design a battery/controller box to hide those things and their wires. It will be similar to the one in the Chop Mountain Bike project, same idea anyway. Probably construct it lighter this time.
To read all of the steps for this project so far go to the ShortHopper category.
I’m still deciding which electric bike conversion kit to install. If you have a recommendation, please leave a comment. Any other comments about this design are welcome too.