Electric Bike / Pedelecs - MOTOR to Sproket suggestions / pic's wanted.

3 posts / 0 new
Last post
kramerica
Offline
Last seen: 10 years 6 months ago
Joined: Tuesday, April 1, 2008 - 16:12
Points: 3
Electric Bike / Pedelecs - MOTOR to Sproket suggestions / pic's wanted.

I'm on my second edition of a scratch built eletric bike. The first setup was a sprocket bolted to the spokes with fabricated motor mount on the left side of the rear wheel. The system worked good on the premise the motor had low rolling resistance, so that when I wasn't using the motor, the bike could still be pedaled. The motor was a small 24volt - from a bike scooter - slow acceleration / slow speed. It wasn't quite geared right, the motor didn't spin up to speed and was working too hard. It was quite fun, but not enough torque or speed. (Top end was 16mph)

I'm currently working on Rev 2:
(Using a larger motor and gearing, better batteries.)

Bigger better motor 130 RPM 20:1 Gear ratio.- that is geared down to a low RPM - 24Volt. The motor doesn't spin by hand, and I need to consider using a freewheel between the Motor and the sproket that is fastened on the left rear tire. My motor has a shaft of 3/4" - Does anybody have any great suggestions on putting a freewheel in place?

My intention is to use a Freewheel ?stacked sproket? (Not sure the tech term) on the drive motor with a derailer so that I can use the gears.. just like you would if you were pedaling. This way I will have gears on both sides. Gears for my pedaling, and gears for the motor... (reasoning is that I have 2 young children that I tow behind me in a bike trailer) - Lower gear's for torque and hills are a requirement.

chas_stevenson
chas_stevenson's picture
Offline
Last seen: 7 years 1 month ago
Joined: Wednesday, December 6, 2006 - 17:14
Points: 1309
Re: Electric Bike / Pedelecs - MOTOR to Sproket suggestions / pi

I would suggest you look at the Cyclone motor setup. You can purchase the motor and all the parts needed without the batteries. Since it is a 24-volt system and you have the batteries this may be the best way for you to go as the Cyclone system uses the gears with the motor.

Grandpa Chas S.

kramerica
Offline
Last seen: 10 years 6 months ago
Joined: Tuesday, April 1, 2008 - 16:12
Points: 3
Re: Electric Bike / Pedelecs - MOTOR to Sproket suggestions / pi

Thanks for your post!
I ordered one (4/2) today. I'll let you know how it works out.

Log in or register to post comments


Who's online

There are currently 0 users online.

Who's new

  • ArizonaAddiction
  • A and D Home Im...
  • ClickClearCommu...
  • stagebuilder
  • adamclarkedu

Customize This