attaching sprockets in place of brake rotor

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ejonesss
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Joined: 05/15/2008
Points: 13

i heard somewhere that power assist kits use the disc brakes somehow.

i am assuming it requires replacing the disc rotor with a sprocket

does anyone have any one know of any sites that sell hubs that can take a 72 tooth #35 chain sprocket?

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dogman
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Joined: 04/29/2008
Points: 830
Re: attaching sprockets in place of brake rotor

You might be able to drill holes and bolt it right to the hub motor, like I've seen done with disk rotors on othter posts, but why, if you have a hub motor allready. I must be missing something again. The rear mounted hub motors come ready to recieve gears but I don't know about how it's done. I assume it's just like on a regular bike.

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spinningmagnets
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Joined: 12/12/2007
Points: 295
Re: attaching sprockets in place of brake rotor

Go here, and scroll down to the last couple of pictures at the bottom:

http://visforvoltage.org/forum/2082-what-about-trailer%3F

It was very cheap and easy. You could make it look nice if you wanted, I like the "hacker" look myself.

"Cyclone" sells a double sprocket with a freewheel. It replaces the stock sprocket, and allows the motor to use the rear gears without you pedalling, or for you to pedal without the motor causing drag.

ejonesss
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Joined: 05/15/2008
Points: 13
Re: attaching sprockets in place of brake rotor

that's well and fine if i have a in hub motor.

i am using a kollmorgen scooter/bike motor

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