36v unite 450w geared bike motor. Only downside is the noise, it mounts really well (using front derailer clamps on the seat tube), and has the proper no-hassle reduction. With this setup the bike has enough torque to pull massive weight up steep hills (if I don't mind going 5mph in the granny gear). Riding on the flats has me using the top gear 42x11.
Battery is my 5 Bosch Fatpacks in for about 11ah. Range with easy pedaling should be 25-30 miles when cruising at 23mph on the flats.
Total weight should be about 52lbs. It handles really nicely with the battery in the center of the frame. I'll be putting a rear rack on for carrying stuff.
Currently this design allows the bike to be pedaled with zero drag while the motor is off. However, I must pedal when the motor is on, so it's more of an assist, "turbo-boost" bike. I must say, the front suspension helps a lot, compared to my previous Giant. With easy/moderate pedaling, I was cruising at 25mph on the flats today.
Once the LBS gets my new longer BB in, I will likely return this setup to the original, right side only setup, where I can coast with the motor on, but I will give up the drag free pedaling when the motor is off. This bike is intended to be a commuter, so that will be fine.
The first pic is what I completed today, but tomorrow I will be putting some more finishing touches on it, such as a noise shield over the gearbox on the motor, an enclosure near the controller and hooking up my watt meter, as well as putting the normal rear wheel back on. (the one with the large sprocket is there bc I first thought of doing a different drive with the scooter motor).
This the best looking ebike I've built too date. Just need to muffle the noise!
- 7-7-10 097.jpg (80.99 KiB) Viewed 1794 times
Last edited by veloman
on Thu Sep 02, 2010 5:18 pm, edited 1 time in total.
Mush! Mush you electrons! Push harder!
Main ride: Old School Specialized Stumpjumper FSR, Clyte HT3525, 74v lifepo4, 12fet Infineon set to 26amps. And a bunch of others... viewtopic.php?f=6&t=34236&p=497325#p497325