rear hub dual threaded?

[jlatshaw]

Hello,

Ok, so I have a plan but I would like to run it by you guys first to see if I'm crazy or not.

So I am making an ebike and I want the power from the chains to remain independent from the motor's power, in this way I will be able to power the bike by pure pedal, pure motor, or a mix between the two without spinning my motor/pedals unnecessarily.

Would it be possible to get a dual threaded hub (or double contact hub, a rear hub that is threaded for left hand drive and right hand drive)
and then two matching freewheel sprockets, and then put all that together and run a chain from my motor to the one sprocket and a chain from my pedals to the other.
In this way, the powers would remain independent and, if it works, I would be happy

So is it possible?

Also, I am a bit new to bikes. What measurements do I have to keep in mind when buying these products? What tools will I need? What are the proper names for the parts that I have mentioned?


Thank you,
-James

 

[Ypedal]

a geared hub motor would do what you are looking for in a way...

but yes, cyclone does a model with 2 freewheels as well..

check
http://www.ypedal.com/rant/rant.htm

will cover many of your questions.

 

[cal3thousand]

If you are somewhat mechanically inclined, there is a modification method being actively developed (and beta tested) by some members on the board to do this same task.

It will allow you to run a geared hub motor as a mid-drive through the chains. This gives you an awesome gear spread for anything from climbing and lugging, to smooth commuting. The modification has allowed the builders to exceed the normally listed continuous power ratings of these motors by introducing an increase in the cooling capacity.

I just started working on my motor for this conversion and we need more folks (who have the inclination and skill) to try it out to get the parts to a scalable kit that people can purchase and modify.

Check it out:

http://endless-sphere.com/forums/viewtopic.php?f=28&t=45245

 

[jlatshaw]

Ya, I wish I would have known about hub motors before hand, but now I have to work with what I have.

Ok so will this work. If I buy this double threaded hub:

http://www.sourcingmap.com/170mm-length-doublecontact-bike-parts-40-holes-disc-rear-hub-p-303845.html?utm_source=google&utm_medium=froogle&utm_campaign=usfroogle&gclid=CK_PysPx1bgCFYdxQgodMAMAuA

And this left side drive single gear freewheel :

http://www.ebay.com/itm/ACS-Southpaw-BMX-Freewheel-16T-Left-side-drive-/330965507479?pt=US_Cassettes_Freewheels_Cogs&hash=item4d0f14dd97

and I already have a right side drive sprocket here at home, so if I take the above, will I be able to connect both freewheels onto the hub, and they will both do work in the same direction, correct?

Also are the sizes of the threadings uniform, or do I have to look out for those also? Will the above match?

Thanks for your time,
-James

 

[lbz5mc12]

Currie electric bikes sale a 26" wheel with dual threads, right side for cranks, left side for motor.

 

[jlatshaw]

Sorry, instead of the above double contact hub, how about this one:

http://www.sourcingmap.com/bike-bicycle-parts-28-holes-disc-rear-hub-105mm-spacing-p-303852.html

thanks,
-James

 

[jlatshaw]

Is it this one on the bottom?
http://electricscooterparts.com/electricscooterwheels.html


Do you think that would be cheaper than the above method?

Thanks,
-James

 

[jlatshaw]

Also, that wheel is advertised as a front wheel, will it still work out well for a rear?

It might just be a lot easier just to buy that and some freewheels.

 

[DrkAngel]

You seem to want the standard Currie-eZip-iZip rear hub.

Several sources available:
Staton-inc.com $89.12

Hub & Large Sprocket - $29.95

Hub & HD Sprocket ~ $40